Original sentence: It satirises elements of educational text books, as well as annuals, which were popular hardcover publications for children featuring short stories, comic strips, and games, often based upon television series and films of the day.The book may be seen as a satire of children's education literature; whether it is actually written for children or is intended as a parody aimed at adults is open to interpetation
Edited sentence: The book is a satire of children's education literature, combining elements of text books as well as "annuals", which were popular hardcover publications for children featuring short stories, comic strips, and games, often based upon television series and films of the day