I finished A Mango-Shaped Space on my lunch break, and it did indeed break my heart.  And I still loved it.  (Maybe someone can buy the rights to make a movie and screw it all up...)  Wendy Mass has another book out, but our copy is checked out.  Not like I don't have plenty to read in the meantime... (And I just checked out Road to Purgatory, Max Allan Collins' prose sequel to his graphic novel, Road to Perdition...)