How many types of sloths are there? Why does their fur turn green? Can sloths swim? This book has all the answers and much more, along with photographs, step-by-step illustrations, simple text and links to websites with video clips and activities.

Chapters in this book include:
- Upside down
- So slow
- Sloth fur
- Turning green
- Finding their way
- Going down
- Leaf eaters
- Sloth poo
- Sloth fight
- Baby sloths
- Growing up
- Strong swimmers
- Sloth sounds
- Fast asleep

James Maclaine has written books about meerkats, general knowledge and manners, come up with countless drawing, doodling and colouring ideas, and devised puzzles and things to do for a range of activity books. His Junior Illustrated Thesaurus is the book that he wishes he'd had as a child.