The Star Trek Cookbook - Neelix was quite the chef in Star Trek: Voyager. So much so that Ethan Phillips co-authored this cookbook. You can cook many of the favorites from all the Star Trek series and many drinks from Quark's bar.
Regional Cooking from Middle-earth: Recipes of the Third Age - It actually doesn't get amazing reviews, but I like the thought! Do any of you have this cookbook?
Zombie Cupcakes: From the Grave to the Table with 16 Cupcake Corpses - I can honestly say that I never thought I would see the words zombies and cupcakes together. The cupcakes probably don't taste like brains, but since I've never tried brains...
Lobscouse and Spotted Dog: Which It's a Gastronomic Companion to the Aubrey/Maturin Novels (Patrick O'Brian) - Have you seen Master & Commander? Well, it's based on a fantastic historical fiction series by Patrick O'Brian. Most of the books take place on board various ships, and this cookbook gives recipes on how to fix all the bizarre things they ate in the late 18th century. I've not fixed anything yet, but I've really enjoyed reading it.
The Unofficial Harry Potter Cookbook: From Cauldron Cakes to Knickerbocker Glory--More Than 150 Magical Recipes for Muggles and Wizards - I think this is exactly what a cookbook based on a book series should be: replications of actual food in the books. I've flipped through a couple of times since I purchased it, and I will definitely be using this for an upcoming Harry Potter party.
The Star Wars Cookbook II -Darth Malt and More Galactic Recipes - Did you know there was a second Star Wars cookbook? Like the first one, there aren't really recipes based on food in the films or universe. However, the funny recipe names and photos with action figures make it worth having. The recipes are fun and easy too.