ISBN-13: 9780142412961 / Angielski / Miękka / 2009 / 160 str.
Being a classroom hamster means having to be ready for anything, but suddenly there are a lot of big surprises in Humphrey's world. Even with all that's going on, Humphrey makes time to help a few classmates with their problems, in this latest entry of Birney's award-winning series.