Skip & Spin swim with dolphins/ by Chris Sawyer ; illustrated by Dennis Hockerman..--1st ed. .--[Foster City, Calif.]: Gateway Learning Corporation, c1998..--HOP book.--; 18
Slam & Dunk in the dark/ by Chris Sawyer ; illustrated by Dennis Hockerman..--1st ed. .--[Foster City, Calif.]: Gateway Learning Corporation, c1998..--HOP book.--; 17
Slam & Dunk go to the moon/ by Chris Sawyer ; illustrated by Dennis Hockerman..--1st ed. .--[Foster City, Calif.]: Gateway Learning Corporation, c1998..--HOP book.--; 16
Skip & Spin swim with dolphins/ by Chris Sawyer ; illustrated by Dennis Hockerman..--1st ed. .--[Foster City, Calif.]: Gateway Learning Corporation, c1998..--HOP book.--; 18