The author, John Man, isn’t the first historian to fall for the siren call of ninja history only to plummet into a catch-22, but he’s the one I’m reviewing right now. So, while his book isn’t exceptionally bad, it’s tremendously flawed in a manner common across ninja histories. What is said catch-22? On the one hand, ninja excite the imagination and a half-way decent book on them is sure to sell. On the other hand, there’s very little known about the ninja. If the myth of the ninja is an elephant, the ninja as we truly know him is a grasshopper. [So much so that the first Westerner to write such a history, Stephen Turnbull, has now spun 180, proposing that the ninja never existed but were purely a post-Warring States construct.] While it would seem that Turnbull goes too far given the existence of manuals and vague mentions, what we don’t know about are the nitty-gritty details of ninja missions and those are the stories that the reader desires but which time and the ninja’s legendary secrecy have put forever beyond our reach.
What is in the book? If not tales of ninja stealing into castles to abscond with information or to assassinate an enemy General, and the effect of those actions on the outcome of wars? First, there’s a lot of information that is already widely available in other English language books, such as the influence of Sun Tzu’s chapter on espionage on the birth of the ninja (probably spurious given the centuries in between) and description of the seven types of disguises. Second, there’s a lot of general Japanese history that is necessary to some degree as background, but at some point one realizes the author has ventured beyond background into padding. Finally, speaking of padding, about a third of the book by page count (cleverly disguised as only three chapters) occurs long after the end of the ninja. Don’t get me wrong; some of the World War II material is fascinating, but it’s as if one were reading a biography of Blackbeard and—all of a sudden—one finds oneself reading about a Somali hijacking of container ships in 2011. (Even while you are fascinated, you can’t help but feel that you’ve been the victim of bait-and-switch.) In short, the book has a lot of repetition and padding, and not much that’s both new and on topic. (One of the reasons that I didn’t give the book too low a rating is that if it’s the first book you are reading on the subject, it’s readable and interesting.)
There’s one more flaw that comes from the dearth of information. The author cites everyone and anyone who has said something interesting on the subject, but we don’t really know how reputable said sources are. Some may be sterling and others full-of-shit. It’s easy to say something fascinating about the ninja; it’s much more difficult to say something that’s true and fascinating.
So what does the book do right? It’s well written in terms of being readable and offering frequent mind candy. The author does challenge a few statements as he reports them. My last paragraph may have led one to believe that Man just shot-gunned information out there, but he actually takes a suitably skeptical view for addressing such a murky topic. The problem is that we don’t know how serious to take claims he refutes or those he appears to endorse because he’s not an expert in the field. He is an Asianist historian with a list of books that is all over the map. [I did see just one factual error in which he refers to the companion sword of a samurai as a tanto. A tanto is a dagger, the companion to the katana is the wakizashi. But I don’t know how big of a deal to make out of that sin as I can’t say that I noticed any others (not that I necessarily would as I’m no expert either.) On the other hand, a little fact checking…]
If you’ve never read a history of the ninja before, you’ll probably find this one interesting. If you’ve read the other books out there, it’s less clear that you will. However, I did find the discussion of Iga no Ran (the battle of Iga, a campaign meant to crush the ninja of Iga) to be intriguing. At any rate, as long as you realize the last one-third of the book is off-theme and are alright with that, you should find it palatable.