But Bill Cipher, the inter-dimensional demon bent on taking over the multiverse, is back in action — or at least, he’s back in a new book penned by Gravity Falls creator, Alex Hirsch.

Although Gravity Falls ended after just two seasons, The Book of Bill tie-in project reveals more about both the strange titular town and the mysterious Bill Cipher. Penned by Gravity Falls ...

There’s a new Gravity Falls book on the way, and this time it’s all about everyone’s favorite evil and triangular demon, Bill Cipher. Creator, (and also the voice of Bill) Alex Hirsch ...