[dcminter]

"Terry Pratchett: A Life With Footnotes" by Rob Wilkins really is excellent. If you enjoyed Pratchett's novels and are interested in his life then you will get a lot out of it. It's much better written than I expected of an authorized biography; not a hagiography at all, it showed his feet of clay as well as his halo. Some of it, of course, is very amusing.

Be warned, however, that it covers Terry's deterioration with alzheimers' without pulling its punches much. There were a couple of points where I had to put the book down for a bit and take a break because it was too sad.