Final answer:
Leslie Connor is the author of the book 'The Truth as Told by Mason Buttle', a middle-grade novel focused on honesty and integrity.
Step-by-step explanation:
The author of the book The Truth as Told by Mason Buttle is Leslie Connor. This work of fiction is aimed at middle-grade readers and focuses on themes of honesty and integrity through the story of the protagonist, Mason Buttle. In discussing stories that teach virtue, it's reminiscent of the apocryphal tale of George Washington and the cherry tree, which, despite being fiction, has been used to teach generations of children about the value of honesty.