Yes, it's the Catholic Writers Guild Seal of Approval!
From their own documentation,
The CWG Seal of Approval is our program for helping evaluate the Catholicity of a book. It’s a gatekeeping tool for bookstore owners and readers, and a great plus for any book that’s reaching that audience. Intended mostly for authors that don’t have access to a Imprimatur (like writers of fiction), it basically says that the book does support Catholic belief and traditions.
How cool is that?