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Mysteries According to Humphrey - Birney, Betty G
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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).

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Mysteries According to Humphrey 2016, Faber & Faber, London

ISBN-13: 9780571328352

Main

Paperback

Mysteries According to Humphrey 2013, Puffin Books

ISBN-13: 9780142426692

Trade paperback

Mysteries According to Humphrey 2013, Turtleback Books

ISBN-13: 9780606316996

Bound for Schools & Libraries edition

Hardcover

Mysteries According to Humphrey 2012, Putnam Publishing Group, New York

ISBN-13: 9780399254147

Hardcover

Mysteries According to Humphrey 2012, Faber & Faber, London

ISBN-13: 9780571255436

Paperback