"Tower of Fear" is yet another excellent book by Glen Cook. It's very well-written, exciting, and suspenseful. Unfortunately, as with almost all of Cook's books, this one is hard to find (i.e., it appears to be out of print). I don't know why publishers don't re-print these books. Outside of the Black Company books, almost none of them are now available. I know that the SFBC publishes 3 (or 4, now) books which consolidate the Garrett series (another excellent series). But, these older works, which I read decades ago (and believe are all excellent) have just vanished. If you can grab a copy of this book, do so. I rate it at 5 stars out of 5.