5 stars! 
 Kasie West consistently delivers great, cute, fun YA romances, and with this one, she hits it out of the park! Already I liked Lily. She's quirky but not overbearing. She's not too sweet but, despite her protests and at times annoyance, melts into a puddle of goo when it comes to her family and best friend. She has foot-in-the-mouth disease but she's got a good heart. 
 While she struggles to stay alert in her high school chemistry class, her vandalizing tendencies (victim: her desk) evolve into her trading letters with a mysterious penpal. She can't help but fall for him too. I won't give the romantic interest away (though I think it's obvious), but he really is the perfect balance to Lily's personality. 
 The story's got a You've Got Mail, Music and Lyrics, and Pride and Prejudice vibe to it. Highly recommend if you enjoyed those, and of course, if you enjoy Kasie West's repertoire of adorable, swoony romances.