Check this out. I have a "Ninja Encylopedia." It was published in 1983. The majority of the book is in manga form, but the beginning has some factual information about ninja and actual photographs. Here are some ninja tools: Here's a Ninja house. You can't see too clearly from this pic, but it's got hidden rooms and trap doors with spiked bamboo underneath, etc.: Demonstrations of Ninja fighting: Kuji Kiri Ninja climbing devices: There are a lot of manga drawings in it. Some of them talk about ninja tactics, techniques, weapons, etc. Some of it is stories. And a lot of it features the ninja dude and old man from the Goemon videogame series ("Legend of the Mystical Ninja" for SNES), who you can see here on the left. It's totally sweet. I paid way too much for it on eBay years ago, but I found it when I was taking pics of my Maison Ikkoku manga and remembered how awesome it was so I thought I'd post pics here in case anyone here likes ninja. And don't forget, this Tuesday on History channel on "Deadliest Warrior" they're doing Ninja vs. Spartan. edit - my bad, it's on Spike, not History channel.