ALA Booklist (Sun Jan 01 00:00:00 CST 2006)

Having recuperated from her escapades in The Fran That Time Forgot (2005), girl scientist Franny is back in her lab, this time to forge a tiny doomsday device. Unfortunately, Igor, her canine lab assistant, swallows it, which necessitates Franny's down-sizing herself with her Shrinkerizer and slipping into Igor's nose and down his gullet to retrieve it. That makes for some deliciously gross comedy, which Benton maximizes with his usual freewheeling black-and-white sketches. Series fans will love it all.

Horn Book (Tue Aug 01 00:00:00 CDT 2006)

Franny tries to distract her accident-prone dog/lab assistant Igor from interfering with her creation of a Doomsday Device. When Igor unwittingly swallows it, Franny must shrink to microscopic size, get Igor to sniff her up his nose, and retrieve the detonated bomb. This far-fetched, fast-paced Fantastic Voyage homage is unpredictable. The cartoon illustrations crowd the text but add to its upbeat humor.

School Library Journal

Gr 2-5-In this lively fifth installment in the series, Franny finds herself in a panic when her faithful canine assistant swallows her latest invention. She then must delve the depths-of Igor's stomach-to retrieve her Doomsday Device. While totally unbelievable, the child's imaginative voyage takes her swimming through a sea of snot and boogers and combines the gross-out factor with black-and-white cartoons. The story will appeal to both boys and girls, and the writing style (and even the typeface) is age appropriate. Plus, the very short chapters with art on every page will hold the attention of even the most reluctant readers.-Diane Eddington, Los Angeles Public Library Copyright 2006 Reed Business Information.