Summary
Optical illusions form structures in which curious little men can go up stairs to get to a lower place, hang pictures on the ceiling, and walk on walls. Full description
Reviews by Goodreads
Goodreads is the largest social network for readers. Members provide ratings and reviews of books to express their personal opinions and to help others determine if they would enjoy a book. Goodreads respects the right of individuals to express themselves, but does not tolerate abusive behavior.