This was an adorable story! It was fun to read and had a positive message for kids and teens, plus some science thrown in. 
 The themes were pretty common, and while the characters had distinctly different personalities, they were generalized and stereotyped. I did like how you can see the main three's growth from the beginning to the end of the story. 
 I'm a fan of Wendy Mass' writing style- to the point and clean, and this book wasn't any different. It leaves you satisfied, but it's not too thick and laden down with a complicated plot and characters, making it a good light read. 
 But now down to my favorite thing about this book.... The astronomy! This book has made me sort of obsessed with seeing the next eclipse in the US in 2017. Mass' description of the eclipse was beautiful and enrapturing, and it had a sense of mystery to it. I think any story that has the power to captivate the reader like that is a special one. 
 This would be a good book for a young teen or pre-teen who may not particularly enjoy science, or just needs to know what's so fascinating about the sky and the world beyond it. Pretty much anyone, however, can enjoy this coming-of-age story about three unlikely friends brought together by an eclipse.