This is the third book Lisa Yee has written in a sort of trilogy. I say sort of trilogy, because unlike many trilogies, this series can be read in any order. I'd actually call them companion books more than a trilogy.
The three books are Millicent Min, Girl Genius; Stanford Wong Flunks Big Time; and now the Emily Ebers book. They all take place during the same time period, but they're told from each character's point of view, which are decidedly different. All three are decidedly funny, but Stanford Wong Flunks Big Time is the funniest.
Emily's story is written in short letters from Rancho Rosetta, California to her father who is living on the East Coast and touring again with the band he was in a long time ago, the Talky Boys. Since Emily can't send her letters while her dad's on tour, she puts them all into one journal which she says she'll send him when he's done with his tour. Emily's parents have recently decided to divorce, and many of her letters are about her feelings about this. If your parents or your friends parents are getting a divorce, I think this would be a really great book for you. If it's your parents, I think you will really relate to Emily and perhaps learn some things from her about going through such a tough thing. If it's your friend who's going through a divorce of their parents, I think you might get some good perspective about what your friend might be thinking and feeling, and how you might help (mostly, probably by being there and listening).
Although Emily's parents are getting divorced, this book still has lots of laughs and some really great lessons about the importance of honesty in friendship.
I really have enjoyed this series, and I think you will, too!