In one December, the Ghostbusters went through a Time Slip to 1837 Camden Town. They saved Scrooge by capturing the Ghost of Christmas Past, Ghost of Christmas Present, and Ghost of Christmas Future. Scrooge declared war on Christmas and wrote "A Christmas Humbug" instead of repenting. The book chronicaled how Scrooge defeated the three Ghosts of Christmas by himself. As a result, the book and Scrooge changed the future and Christmas was vilified. Winston Zeddemore, Ray Stantz, and Peter Venkman walked to Fifth Avenue and observed Scrooge decorations, people full of ill well, and a stack of "A Christmas Humbug" books. They realized what they done and raced back to the Firehouse. Once the Ghostbusters rectified the timeline, "A Christmas Humbug" ceased to exist.
- On page one of Ghostbusters Issue #16, there is a "A Christmas Humbug" sticker in the last panel to the right of Winston on the bin.
- On page two of Ghostbusters Issue #16, copies of the book make a non-canon cameo in a store's display.
- On page two of Ghostbusters Volume 2 Issue #11, a copy of "A Christmas Humbug" makes a non-canon cameo on the desk by Wally.
- ↑ Winston Zeddemore (2009). The Real Ghostbusters - "Xmas Marks the Spot" (1986) (DVD ts. 09:30-09:33). Time Life Entertainment. Winston says: "A Christmas Humbug by Ebenezer Scrooge."