This is a large PDF that lists 1,713 different mentor texts, author's name, what subject areas they can be used in to teach, and what grades / age-group the book suits best. It is a super helpful guide for teachers to use when looking for that perfect mentor text! You can easily find the section "Writing Persuasive Essays" and find the book I Wanna Iguana, by Karen Kaufman. There are more books for specific holidays, or organized by genre, than strictly mentor texts. It is a great resource!