This series of books is an excellent way to bring ancient civilizations to life. The Binkerton twins and their little sister happen to enter a deserted looking travel agency. There the mysterious owner gives them a book about a certain time period. Once they open the book, they are transported to that time period and must stay there until they have finished reading the book. The book they must read is full of information about many aspects of each civilization, including clothing, food, shelter, education, and more. The predicaments the siblings find themselves in are both funny and adventurous, and they are often humorously contrasted with the information given to them in the book they must read.
Additional information about each civilization is found at the back of each book along with a map. Each book is composed of 48 pgs.