In the Arlington utility tunnels. From Arlington Cemetery north, go up a set of stairs on the left then right at the top. It's on a shelf on the right side of the room.
In the car dealership building to the east, on the upper level where there are smaller, ruined vehicles. You need to jump onto the coffee table in the corner to get to there. Its on a generator.
In Franklin Metro Utility, through an underwater section of the subway tunnels near a lot of radiation. On a shelf with missles and darts, etc. Can also be reached from the subway entrance next to Hubris Comics
Farragut West metro station
Bottom of the room with the ghouls, behind a locked door (average).
In an ammunition container in the burned out bus near the red railroad car NW of the building that is north of the office (not the same red car where Dogmeat is found). You can get the key from the random encounter "More Than Just Scrap", or you can just pick the lock (hard).
In a room full of weapons on the bottom floor behind a very hard door or a very hard terminal.
Notes
It is possible to obtain infinite copies of the book from a raider in the Bethesda East offices who respawns every 73 game hours.
An image of this book is copied onto a slide for the Vault Dweller's Survival Guide. The slide's identifying number is VDSG Plate #619-58.
It is likely that "recipes" is an analogy to combat tactics involving the flamer, presented in a humorous format of a cookbook.
This is the only skill book unique to Fallout 3, as it is not present in earlier games and does not return in Fallout: New Vegas, due to the Big Guns skill being collapsed into Guns, Energy weapons and Explosives, as well as being replaced by Survival. Nonetheless, the item itself is still present in the resources of Fallout: New Vegas, but is not placed anywhere in game.
This book is a reference to The Anarchist Cookbook which was first published in 1971, is a book that contains instructions for the manufacture of explosives, rudimentary telecommunications phreaking devices, and other items. It was written by William Powell to protest United States involvement in the Vietnam War.