Looking for Alaska is the second John Green book I've read (with The Fault in Our Stars being the first). 
 I ended up liking this book more and more as I was working my way through it, so I wish I had the option of doing 3 1/2 stars. I thought the setting of the story at an elite boarding school allowed for some forgiveness around the maturity of the teens in their life views, but at times I felt like they were too adult in the way they were looking at things. One of the things I do like about both of John Green's books that I've read is that he writes about and for teenagers in a way that is not condescending. Without giving away too much, there are some issues that I believe he dealt with in a way true to the teenage years, there are other issues that i believe his characters dealt with in a way that was more adult than their years.