Fangirl by Rainbow Rowell

Twins Cather and Wren have been Simon Snow fans since the very first book came out.  More than fans, they both used to write fanfiction, and Cath still does.  In fact, her fanfic is some of the most popular in the entire world.  But now the girls are going to college, and Wren wants everything to be different (starting with not being roommates), and Cath wants everything to stay the same.  But things won't stay the same; things keep changing, and Cath isn't sure if she can make it.

Simon Snow seemed to me a mixture of Harry Potter and Twilight.  It's got the intense, crazy fandom and the massive fanfic network they both have, Harry Potter's magical wizarding world, but with the writing full of descriptions of clenched square jaws and tousled golden hair which is pure Twilight.

I didn't find Cath, our main character, especially likable.  She grew on me, but until I better understood what was going on I just found her sullen and a pain.  She was way past someone who's shy, or a little antisocial, or who's nervous about starting college.  Cath went to extremes to not talk to or interact with people.  Even when they were being nice to her.  Cath was pretty unpleasant to anyone who tried to talk to her.  She had no interest in making new friends, having new experiences or doing anything she hadn't always done before.  She hid in her online world, where she was safe and secure and didn't have to look at or talk to anyone.