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The unnamed Gravity Falls Graphic Novel is the first official Gravity Falls comic with new original content. It was announced at D23 on July 14, 2017, at Alex Hirsch and Daron Nefcy's panel promoting Gravity Falls: Journal 3 and Star and Marco's Guide to Mastering Every Dimension, respectively. Amazon Canada has the release date listed as July 24, 2018.
- It was originally listed as XQWLWOHG PBVWHUB ERRN (which decodes to UNTITLED MYSTERY BOOK using the Caesar cipher) on Amazon Canada.