Reddit mentions of Catalyst

Okay so, YA books are my jam, and I'll get to those in a second. But if you want a fun summer read you'll have trouble putting down, Mr. Penumbra's 24-Hour Bookstore is great. It's a really fun read, especially for people who like books. It's got mystery, humor, and you'll stay up way too late reading to figure out what's going to happen next. It's not the deepest or most challenging book in the world, but it's real fun and well paced.

For YA, anything by Laurie Halse-Anderson is amazing. I've read Speak more times than any other book. Her book Catalyst is also really awesome. And I just finished her book Twisted a few days ago, and it was a great, quick read. (I actually finished it in one lazy day!)

Jay Asher's Thirteen Reasons Why is heartbreaking. If you liked Fault in Our Stars, I'm sure you'll love this. It's a great concept (girl who kills herself gives a series of tapes to a boy to explain why she did it), and it's just superbly well written. Along the same lines, Markus Zusak's I am the Messenger is also a great high-concept, all-the-feels read.

If you like the more fantasy-esque YA books, the best series I've found is Clive Barker's Abarat series. If you end up getting these, make sure to get the hardcover versions. The writing is great itself, but what really makes the series is that each book has over 300 paintings and illustrations done by the author himself. It's a great epic, and the third book of five just came out last year. The series gets darker as it goes, which is great.

And, finally, not a YA novel, but Adam Rapp's The Metal Children is an awesome play about a guy who wrote a YA book that's the focus of a censorship argument in a small town. It's got some great points in it, and is a fast, fun read.

Hope this helps! Sorry if I used the word 'great' too much. :P

Oh! I love reading books!