Firstly, the book is beautiful. The type, the margins, the illustrations are such a clear improvement on the 'technical book' industry's normal fare.
I really, thoroughly enjoyed the book. It's a pretty quick read. I read it in about 2 sittings. It had a good mix of authors that I was very familiar with, and that I had scarcely read prior. The book is sectioned into 4 separate classic programming puzzle problems, and 4 authors take a stab at each of the problems.
More personally, there are authors who you are familiar with, and authors that you aren't, and you get different things out of each experience.
Authors that I love, like Douglas Adams, or authors that are so stylistically well known, like James Joyce or Hemingway, were fun to read, almost as a validation of what I knew about them, but also as a good way to reminisce about the way I felt when reading them in the past. It was enjoyable to compare how I thought Douglas Adams might approach his problem vs. the way that Angus thought he might (pretty close!).
Angus is hilarious, well-read, and a great writer. I have a bunch of books that I need to go read now...