Humphrey has always investigated things, but this is a true mysteryNMrs. Brisbane is missing! Humphrey has just learned about Sherlock Holmes, so he vows to be just as smart about collecting clues and following leads to solve the mystery of Mrs. Brisbane (and a few others along the way).
EEK-EEK-EEK Mrs. Brisbane is missing

Humphrey has always investigated things, like why Speak-Up-Sayeh was so quiet and Tall-Paul and Small-Paul didn't get along, but this is a true mystery--Mrs. Brisbane is missing She just didn't show up in Room 26 one morning and no one told Humphrey why. The class has a substitute teacher, called Mr. E., but he's no Mrs. Brisbane. Humphrey has just learned about Sherlock Holmes, so he vows to be just as SMART-SMART-SMART about collecting clues and following leads to solve the mystery of Mrs. Brisbane (and a few others along the way).

Nominated for twenty-four state awards and the winner of seven, the Humphrey series is a hit across the country.