Knuffle Bunny Free: An Unexpected Diversion is a children's picture book written and illustrated by Mo Willems.

She dreams of all the fantastic places Knuffle Bunny will visit and all of the fun things he will do.

In an epilogue to the book, Mo Willems wishes the real Trixie, his daughter, a happy and fulfilling life, and he predicts that Knuffle Bunny will someday return as a playmate for his daughter's own child.

In The New York Times, the American columnist Pamela Paul stated that the book "will leave children aspiring to be like its hero or proud that they already are.

"[1] Knuffle Bunny Free debuted at the number one spot on The New York Times Best Seller list.