Mysterious Creatures (Mysteries of the Unknown) – Hardcover – VERY GOOD

A nice touch is the illustrated page numbers shaped like leaves.

Portrait of an Unknown Woman: A Novel; Gabr- 0062834851, Daniel Silva, hardcover

What stands out about this activity book is the mix of puzzles for all ages.

Capitalism: The Unknown Ideal – Mass Market Paperback By Rand, Ayn – VERY GOOD

This nature guide is illustrated with paintings of each species.

Address Unknown: A Novel – Paperback By Taylor, Kathrine Kressmann – GOOD

What stands out about this activity book is the spiral binding for flat pages.

Capitalism: The Unknown Ideal – Mass Market Paperback By Rand, Ayn – GOOD

You will find that this activity book has a gentle learning curve for beginners.

The Unknown Shore – Paperback By O’Brian, Patrick – GOOD

With this activity book, you can challenge a friend and see who finishes first.

The UFO Phenomenon (Mysteries of the Unknown) – Hardcover – GOOD

This activity book features mazes that get trickier as you go along.

A Spy Alone – Paperback By unknown author – GOOD

This activity book has hidden picture puzzles that take time to solve.

B1 In Search of the Unknown – Dungeons & Dragons – AD&D – D&D

The illustrated fairy tales here are darker than the usual versions.

Mystic Places (Mysteries of the Unknown) – Hardcover By George Constable – GOOD

This novel creates a setting so vivid you can almost smell the rain.