These scans are from the book "Sonic the Hedgehog".
Written by Michael Teitelbaum and Illustrated by Glen Hanson.

The basic summary is: A backstory on Sonic and Robotnik, although is much 'sillier' and not really related to the SatAM storyline (even though Sally is in it.)
Sonic and Robotnik are orphans, living with Sonic's Uncle Chuck. Robotnik is a little brat, interested in robots, and always trying to hurt Sonic.

He leaves finally, after Sonic destroys one of his robots. Eight years later, he is back. He's kidnapped the King of Mobius and taken over. He roboticizes many of the Mobians. When Sonic goes to fight him, he meets Princess Sally. They manage to rescue Sonic's uncle and dog, and they escape to Knothole.

Click on cover to download. Zip file, 695 KB.
These scans are from the book "Robotnik's Revenge" : Written by Michael Teitelbuam, Illustrated by Glen Hanson.

The basic summary is: On a scouting mission, the Freedom Fighters are attacked by Robotnik's troops. Bunnie is captured and Sonic and Co. come to her rescue, but not before she is partially roboticized.

Click cover to download. Zip file, 1 MB.
These scans are from the book "Up Against The Wall".
Written by John Michlig and Illustrated by Art Mawhinney.

Click on the cover to download. Zip file, 1.26 MB.
These scans are from the book "Fortress of Fear": Written by Michael Teitelbuam, Illustrated by Glen Hanson.

The basic summary is: Rotor is captured. He learns from Snively that Robotnik is looking for a list made by King Acorn that tells other Freedom Fighter groups and locations. He escapes and tells the others. Later, the Knothole crew discover a scrap of poem that has clues to the list's location. They go to Robotropolis and look for the list. Robotnik finds it first, but they manage to retrieve it from him.

Click cover to download. Zip file, 871 KB.
These scans are from the book "The Secret Admirer"
Written by John Michlig and Illustrated by Art Mawhinney.

Click cover to download. Zip file, 1.60 MB.
These scans are from the book 'Sonic's Shoe Blues'.
Written by John Michlig and Illustrated by Art Mawhinney

Click on cover to download. Zip file, 1.14 MB.
These scans are from "Sonic the Hedgehog: Look and Find" Illustrated by Art Mawhinney. I'll have the entire book up sometime in the future!
Sally riding a dolphin.
Sally leading a group to battle!
Antoine in a toxic lake.
Scratch is in trouble.
YEEEHAA! Swatbot cowboys!
Uncle Chuck and Muttski.
Uncle Chuck with a wrench
Sonic in a mining cart
Married Swatbots!
Swatbot politicians.
Antoine and some waffles.