Title: This is Not My Hat
Content:  This Is Not My Hat is a 2012 children's picture book by the author and illustrator Jon Klassen. The story is told through the unreliable narration of a little fish, who has stolen a hat from a big fish and how the big fish reacts to the theft. It is a thematic follow-up to I Want My Hat Back and was meant to be a more literal sequel until Klassen took a suggestion to change which animals were in the story. The book was well received by critics who praised its dark or ironic humor which could only be understood by comparing the words of the little fish's narration against the events of the illustrations. In addition to several positive reviews, Klassen won the 2013 Caldecott Medal and the 2014 Kate Greenaway Medal becoming the first book to win both awards. This is Not My Hat was also a commercial success.
Title: This is Not My Hat
Content:  This is Not My Hat received favorable reviews including several starred reviews. In its starred review Booklist praised the book's humor and noted its "suggestively dark conclusion", The Bulletin of the Center for Children's Books called the book "quite simply, an outstanding book", and Publishers Weekly wrote that, "Klassen excels at using pictures to tell the parts of the story his unreliable narrators omit or evade". The Horn Book Magazine and School Library Journal also awarded the book starred reviews. In a "highly recommend" review for Library Media Connection librarian Lisa Wright writes, "The narrative parallels the illustrations as the reader deduces the facts of the actual theft." In a review for The 
Title: This is Not My Hat
Content:  York Times children's literature expert Roger Sutton notes that the action and illustrations mean not all young children will be old enough to understand and appreciate the book. The book spent more than forty weeks on The New York Times Best Seller list and the combined sales of it and I Want My Hat Back were more than 1.5 million copies. The book appeared on several best of children's books of 2012 lists including Publishers Weekly and Entertainment Weekly. This is Not My Hat was the winner of the 2013 Caldecott Medal and Klassen was also awarded with a Caldecott Honor the same year for Extra Yarn, only the second time that has 
Title: This is Not My Hat
Content:  Following the success of I Want My Hat Back, Klassen attempted unsuccessfully to tell more stories with the same characters, until the art director at his publisher, Candlewick Press, suggested he try new characters instead. Klassen then switched from mammals to fish. Klassen also felt that this story was more "dramatic" than his earlier work and cited "The Tell-Tale Heart" as a thematic inspiration. For this book he sketched the illustrations in ink before digitizing them and finishing the colors and details electronically. The book was published on October 9, 2012, and was translated into more than 22 languages. Klassen toured 15 cities in the United States to promote the book. In 2014 an audiobook read by John Keating and accompanied by string instruments to represent the actions of the fish, in a way similar to the orchestration of Peter and the Wolf, was released by Weston Woods Studios, Inc.. In October 2019, Candlewick Press released a boxed set featuring This is Not My Hat along with its two companion books (I Want My Hat Back and We Found a Hat), calling it Jon Klassen’s Hat Box.
Title: Jon Klassen
Content:  Jon Klassen (born November 29, 1981) is a Canadian writer and illustrator of children's books and an animator. He won both the American Caldecott Medal and the British Kate Greenaway Medal for children's book illustration, recognizing the 2012 picture book This Is Not My Hat, which he also wrote. He is the first person to win both awards for the same work. This Is Not My Hat is a companion to Klassen's preceding picture book, I Want My Hat Back (2011), which was his first as both writer and illustrator. Both books were on the New York Times Best Seller list for more than 40 weeks; by April 2014 one or the other had been translated into 22 languages and they had jointly surpassed one million worldwide sales. Both books were recommended for children ages 5+ by the Greenaway judges. Klassen's "hat" trilogy was completed with the publication of We Found a Hat (2016).
Title: I Got This Hat
Content:  I Got This Hat is a children's book written by Kate and Jol Temple. It is illustrated by Jon Foye. The book is published by HarperCollins and is available in ABC Shops. It has been selected as the 2016 National Simultaneous Storytime book and was read by over 500,000 school students at the same time on May 25, 2016. The book has also been produced as an app with funding from the Australia Council for the Arts.
Title: This is Not My Hat
Content:  As Roger Sutton noted in his review of the book for The New York Times, the book can only be understood by weighing the words against the actions depicted in the illustrations, since what happens at the end is not explicitly stated but instead left to the reader to figure out. The small fish, acting as the book's narrator through its monologue, is not only amoral but also "outrageous" in the claims that it will not get caught. The small fish can be seen as either talking to the reader or themselves. The book presents a complex ethical message, with an amoral narrator. This is Not My Hat suggests both not to steal but that if you do steal not to get caught. The reader can both 
Title: Jon Klassen
Content:  without repercussion? A bookseller, who "need[ed] to go on record as saying I LOVE this book", reported that some customers love it until they turn the last pages. It was a runner-up for the American Geisel Award (books for beginning readers) and made the Greenaway shortlist. Klassen modified the story in a companion book one year later, This Is Not My Hat (Candlewick, 2012). It features a little fish who steals and wears the hat of a big fish, whom the little one evades until the last pages. Finally the big fish swims back into the book, wearing the hat, with no sign of the thief. This 
Title: The Hat (book)
Content:  The Hat is a children's book written and illustrated by French artist and author Tomi Ungerer. Published in 1970 by Parents' Magazine Press, the book tells the story of a penniless Army veteran, Benito Badoglio, who becomes rich after he unwittingly gains possession of a magic flying top hat. The book is richly illustrated and the text contains numerous vivid and mellifluous descriptions and dialog. For example, upon meeting the top hat, the protagonist cries, "Thunder of Sebastopole!"; in another scene, he shouts, "A thousand Potemkins!" Other characters in the book are "cutthroats", "brigands", a "fainting contessa", and a "dashing cadet". The author's interest in such colorful prose was explained by Selma G. Lanes in the Atlantic Monthly: "Ungerer feels strongly that children enjoy unfamiliar words and euphonious, mystifying phrases." The setting for The Hat 
Title: This is Not My Hat
Content:  Caldecott Chair Sandra Imdieke praised the book's illustrations: “With minute changes in eyes and the slightest displacement of seagrass, Klassen’s masterful illustrations tell the story the narrator doesn’t know.” Klassen found out as he was about to get in an early morning cab to fly to California. Klassen was surprised by his win and tried not to think about it, saying, "It’s such a prestigious award that the idea of winning one is pretty easy to put out of your head." This is Not My Hat was also the recipient of the 2014 Kate Greenaway Medal. Klassen is the first person to win both the Greenaway and Caldecott awards for the same work.

Question: Who is the author of This is Not My Hat?
Answer: Jon Klassen.