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…
'Gravity Falls' Is Getting a Companion Book Centered on a Key Character collider.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from collider.com Daily Mail and Mail on Sunday newspapers.