Jon Klassen is one of the best authors and illustrators of picture books. In our website, we already named his “Hat Trilogy” the best books of the last decade. and had high praise for his shape trilogy with Mac Barnett. This is why we are super excited for after his announcement on social media that he will be releasing his new book “The Rock From The Sky” in 2021 . The does not appear to be about Dwayne Johnson falling from the sky, but his summaries the cover, back cover, and summary he posted on social media make are sure to wet Klassen fans appetite for the book which appears to feature some of the characters we met in “I Want My Hat Back.: Check out Klassen’s social media posts below for all the info.