The Wizard of Oz recommendation card should include the book title, author, reason for recommendation and personal signature.

The format of the Wizard of Oz recommendation card should first clearly indicate the title and author of the book so that readers can accurately identify the recommended book. Next, write down the reasons for the recommendation on the recommendation card, which can include appreciation of the book's content, plot, characters, or author's style, as well as a description of the gains and enjoyment the reader is likely to get. Reasons for recommendations should be specific and persuasive to attract readers' interest. Finally, add the individual's name or signature to the recommendation card to add credibility and personalization to the recommendation. Such a recommendation card format can help readers better understand the recommended books and decide whether to read them.