7 books
Dude, You're Getting Married!
Dude, You're a Dad!
Dude, You're Gonna Be a Dad!
The Slackers Guide to U.S. History
Slackers Guide to U.S. History, The: The Bare Minimum on Discovering America, the Boston Tea Party, the California Gold Rush, and Lots of Other Stuff Dead White Guys Did
Science In Your Life
The Cell