Book 1

It’s A Twin Thing

by Mary-Kate Olsen and Ashley Olsen

Published 18 March 2002

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Ashley can’t wait to go back to school. The new school year means shopping for new clothes, meeting new boys… shopping for MORE new clothes! Her twin sister, Mary-Kate, thinks she’s crazy. Mary-Kate would much rather hit a softball than a mega-mall. But they do agree on one thing:
THEY’RE WAY TOO OLD FOR A BABYSITTER!

Too bad their dad doesn’t see it that way. Now the twins need a plan – a plan to show Dad just how right they are!

Adapted by Judy Katschke.
From the teleplay by Howard Adler and Robert Griffard.
From the series created by Robert Griffard and Howard Adler.


Book 2

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Ashley is SO jealous. Mary-Kate has a new maths tutor, and he’s totally cute! The problem is, Mary-Kate couldn’t care less about cute. Her maths lessons are making her miss basketball practice – and that means she won’t be able to play in the big game!

So the twins decide to switch places. Now Ashley is working on fractions with the tutor, while Mary-Kate is working on her jump shot.

But can they fool everyone long enough to get what they want?

Adapted by Megan Stine.
From the teleplay by Bob Keyes and Doug Keyes.
From the series created by Robert Griffard and Howard Adler.


Book 3

The Sleepover Secret

by Mary-Kate Olsen and Ashley Olsen

Published 18 March 2002

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

What a blast! Ashley is having a sleepover – and Jennifer Dilber, the most popular girl in school, is coming!

Ashley works super-hard to make sure her party will be perfect. She doesn’t want any surprises. But she gets a BIG surprise when the girls play Truth or Dare – and Mary-Kate tells Jennifer an amazing secret. A secret she’s never even told Ashley…

Adapted by Judy Katschke.
From the teleplay by Dan Cross and David Hoge.
From the series created by Robert Griffard and Howard Adler.


Book 4

One Twin Too Many

by Mary-Kate Olsen and Ashley Olsen

Published 7 April 1999

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Oh no! Mary-Kate and Ashley have to do history projects. But Ashley’s found a way to make her project fun – she’s partners with Pokey Valentine, the boy of her dreams! It’s the perfect way to get close to him.

The only problem is, Pokey would rather get close to someone else… someone named Mary-Kate!

Adapted by Megan Stine.
From the teleplay by Howard Adler and Robert Griffard.
From the series created by Robert Griffard and Howard Adler.


Book 5

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Cool! Mary-Kate and Ashley have a new telescope. Their father bought it so they could learn about the stars. The twins have a better idea, though. They’re going to spy on the neighbours!

But the spying turns serious when Mary-Kate sees something she shouldn’t. Something that spells big trouble for the twins…

Adapted by Judy Katschke.
From the teleplay by Larry Kase and Joel Ronkin.
From the series created by Robert Griffard and Howard Adler.


Book 6

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Ashley's going to be a model – and she can't wait. Reel Teen magazine is coming to her school to pick their model of the month, and Ashley just knows they're going to pick her. But when the big day comes – the winner is Mary-Kate!

Oh, no! Now what is Ashley going to do? She doesn't want to give up her dream – but how can she steal the spotlight from her own sister?

Adapted by Megan Stine.
From the teleplay by Tom Amundsen, Bob Keyes and Doug Keyes.
From the series created by Robert Griffard and Howard Adler.


Book 7

Two’s a Crowd

by Mary-Kate Olsen and Ashley Olsen

Published 1 July 2002

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Mary-Kate thought her twin sister Ashley would be her best friend forever. But now Ashley has a new best friend! Ashley's spending all her time with Nicole, and Mary-Kate feels totally left out. She has to get rid of Nicole – and she knows just how to do it.

She pretends to be Ashley and tells Nicole their friendship is over. It works. Everything's back to normal – until Ashley finds out!

By Judy Katschke.
From the teleplay by Chip Keyes, David Hoge and Dan Cross.
From the series created by Robert Griffard and Howard Adler.


Book 8

Let’s Party

by Mary-Kate Olsen and Ashley Olsen

Published 1 July 2002

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Ashley has a great idea! She’s going to give a party for her best friend, Jennifer. But Ashley gets a surprise too – when she finds out that Mary-Kate is giving another party for HER best friend Amanda on the same night!

But the biggest shocker of all is the one Dad has for both of the girls – one that’s going to change their lives BIG-time…

By Megan Stine.
From the series created by Robert Griffard and Howard Adler.


Book 12

Cool Club

by Marykate Olsen and Ashley Olsen

Published 1 August 2000

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived...

There's a new girl, Elise, at White Oak Academy - and Mary-Kate and Ashley think she's the coolest. That's why when she forms a new super-secret club and asks Mary-Kate and Ashley to join, they say yes.

They're thrilled - until things start to go really wrong. None of Mary-Kate and Ashley's other friends are invited to join the club! And then Mary-Kate and Ashley find out that the kids in the club have a huge secret - one that could get them into very big trouble!

Adapted by Judy Katschke.
From the series created by Robert Griffard and Howard Adler.


Book 13

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Ashley HATES school uniforms. But she wrote an article about dress codes for the school newspaper – and now everyone thinks she LIKES them. Students at White Oak Academy might have to wear uniforms – and they’re blaming Ashley!

Mary-Kate agrees to help Ashley ban uniforms forever. But they’ll have to work fast – or face a fashionless future!

By Megan Stine.
From the series created by Robert Griffard and Howard Adler.


Book 14

Bye-Bye Boyfriend

by Mary-Kate Olsen and Ashley Olsen

Published 3 March 2003

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Mary-Kate has a great new hobby – acting! She's got the starring role in the next school play. And she's thrilled to find out that her leading man will be Ross Lambert – a supersweet guy who just happens to be Ashley's big-time crush!

Ashley is excited for her sister – until she finds out that Mary-Kate has to kiss Ross on stage. There's no way that's going to happen. Not if Ashley can help it!

By Judy Katschke.
From the series created by Robert Griffard and Howard Adler.


Book 15

It's Snow Problem

by Nancy Butcher

Published 1 February 2001

Book 15

It’s Snow Problem

by Mary-Kate Olsen and Ashley Olsen

Published 3 March 2003

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Hans Jensen is tall, blond, and gorgeous – and thinks he's the best at everything. When he signs up for every ski race in the White Oak/Harrington Winter Festival, Mary-Kate does too. Hans isn't the only super-athlete around – and she's going to prove it!

But then Mary-Kate gets into major trouble – and is thrown off all the teams! Can Ashley help her sister get back on – or is Mary-Kate out of the race for good?

By Nancy Butcher.
From the series created by Robert Griffard and Howard Adler.


Book 16

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

The annual Spring Fling's coming up and Mary-Kate and Ashley have hot dates for the dance. At least they think they do – until they find out their dates have asked other girls instead. To make matters worse, Mary-Kate's crush is going out with her best friend! Should Mary-Kate and Ashley just go ahead and get new dates for the dance? Or should they get… revenge?

By Megan Stine.
From the series created by Robert Griffard and Howard Adler.


Book 18


Book 18

Two for the Road

by Mary Olsen and Ashley Olsen

Published 31 July 2001
While in Florida on their school trip, Mary-Kate searches for her lost diary and Ashley worries about competition from Dana Woletsky.

Book 19

Surprise Surprise

by Mary-Kate Olsen and Ashley Olsen

Published 7 July 2003

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

The good news is – Mary-Kate made the White Oak winter sports team! The bad news is – she has no money to buy her own snowboard. She asks Ashley to help her, but Ashley has problems of her own. She's trying to win a dream job at a hot new fashion magazine.

Should they break the rules to get what they want?

By Megan Stine.
From the series created by Robert Griffard and Howard Adler.


Book 20

Sealed With A Kiss

by Mary-Kate Olsen and Ashley Olsen

Published 1 December 2001

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Mary-Kate and Ashley can't wait to go home for winter break. But they wind up stuck in a Harrington dorm instead. To make matters worse, the headmaster thinks that doing endless chores is more fun than singing carols and decking the halls!

But things start to look up when the girls meet a new boy with a romantic holiday secret…


Book 21

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

Mary-Kate and Ashley have great tricks ready for the Harrington Magic Show. They’re sure to be a hit! But before show time, Ashley’s partner leaves her trapped in a box and Mary-Kate’s mind-reading horse disappears. The girls are going to need some real magic to get out of this one!

By Megan Stine.
From the series created by Robert Griffard and Howard Adler.


Book 22

April Fools’ Rules

by Mary-Kate Olsen and Ashley Olsen

Published 3 November 2003

Meet Mary-Kate and Ashley, the Tween Queen Twins! Your new best friends have just arrived…

It’s April Fool’s Day, and Mary-Kate and Ashley plan to go down in White Oak history as the best pranksters ever. But when they take a joke too far, they put the headmistress’s job on the line. And this time, it’s no laughing matter!

By Judy Katschke.
From the series created by Robert Griffard and Howard Adler.