Sonic the Hedgehog: Official Game Guide, Sonic Wiki Zone

Sonic the Hedgehog: Official Game Guide is a strategy guide book published by Prima Games in the United States for Sonic the Hedgehog (2006).

New Sonic the Hedgehog (1991) prototype uncovered by preservation groups - Tails' Channel

Sonic the Hedgehog Modern Style Guide, Sonic Wiki Zone

Sonic the Hedgehog Genesis, Sonic Wiki Zone

Sonic Rush - Wikipedia

Sonic Adventure 2: Battle Strongest Strategy Guide

Sonic CD - Wikipedia

Sonic the Hedgehog (promotional comic), Sonic Wiki Zone

Sonic the Hedgehog Adventure Gamebook 2, Sonic Wiki Zone

Sonic the Hedgehog (2013), Sonic Wiki Zone

Sonic Spinball - Wikipedia