Check out Hardy Marks publishing, the Rollo book, the NYC book. A great one (that I just now realized I lent to a friend) is Taki's Tattooing from Japan to the West, just a fun overview type interview book from a little while back, lots of cool stuff in there. And Underway is the Only Way if you can get it, can't remember if it's outta print or what, but that's a killer tome.