3.99 avg rating — 428,860 ratings

"The way Pratchett uses words to keep his characters deeply moving and yet comical inspires more words than even a picture can portray."

3.92 avg rating — 329,040 ratings

"This book changes the way you think. Like Flatland, SiaSL uses prolonged insight into multiple dimensions to propel the hypothesis that other dimensions exist (such as the fourth dimension)."

3.81 avg rating — 79,140 ratings

"Much of the universe remains unknown until this book is read and fully understood. With less than 200 pages, this should at least be a requirement for obtaining a high school diploma, by far."