Like I said, Percy Jackson and the Greek Gods is basically the original mythology stories, told according to Percy. With lots more humour, a bit less gore (because those myths are gory af) and just so so so much humour, gods. That is one of the reasons I love Riordan's books so much, he manages to make me laugh (out loud) with his book and mostly his chapter titles every damned time.
First, Percy explains about how this whole mythology started; with Ouranus and Gaia, and their twelve Titan children. How Kronos killed his father to become the 'king' of the world and how eventually Kronos would have something similar to him happen by the hands of his own children. Karma's a bitch. Then, Percy picks fifteen Gods and Goddesses to
I knew most of these stories already, so it wasn't that exciting to me, but the way Percy/Rick told them were so nice and so hilarious. There were a lot of references to modern things - like cellphones and facebook and Justin Bieber - and it was just so strange and amazing to see those mixed in with those old mythology stories. I really think that choosing to write this book like this was the best idea Rick ever had.
If you want to know more about Greek mythology, but you don't want to read those 'boring' books, I definitely recommend you pick up Percy Jackson and the Greek Gods. But only pick up the edition I have, okay? I'd be insanely jealous if you'd picked up the beautiful illustrated edition (which I might still do soon. I think. I don't know). I'll certainly be picking up the other book 'Percy' has written, named Percy Jackson and the Greek Heroes - talking about all those demigod and mortal heroes like Hercules, Perseus and so on.
My opinion on this book in one gif: