Sonic the Hedgehog: Fortress of Fear

Sonic the Hedgehog: Fortress of Fear is a children's chapter book written by Michael Teitelbaum and published by Troll Associates, Inc. The book features characters from the popular Sonic the Hedgehog cartoon and video game series. It draws influence from the Sonic the Hedgehog Saturday morning cartoon show, and takes place in environments, and stars characters that were exclusive to that universe, such as Princess Sally, and the Freedom Fighters.

The book also features original characters, such as Digger the Woodchuck, a member of another group of Freedom Fighters. None of these original characters are ever depicted in the illustrations, and they have not appeared in further media, so it is entirely left to fans to speculate what they may look like.

Thirteen full page illustrations, drawn by Glen Hanson, are found in the book. The illustrations typically accompany scenes of heavy action or suspense, and help to depict the events that are occurring. Typically there is only one illustration to a chapter, though there may be two illustrations in the instance of climactic battles or turning points in the story. The illustrations are all black and white inked line art, featuring no colors or tones. Stylistically, the visuals are very similar to those of the SatAM cartoon series, though with a more light, comical overtone.