Pratchett is one of the greatest, sharpest, most entertaining and enlightening writers of all time. His Discworld series has provided me more entertainment (and often thought provoking entertainment at that) than just about any thing else I can think of. While my personal favorites are the Discworld books that follow the city watch and Commander Sam Vimes (one of my all time favorite characters in any media), every book in the series is worth reading. Starting with book four, Mort, all the way to book 33 or so Unseen Academicals, Pratchett has established himself as a brilliant world builder, character creator, satarist, and humorist. While several of his books would make my top ten of all time list, Nightwatch could very easily take the very top spot.
The two books covered in this volume are the first two Tiffany Aching books (as with many of the Discworld books, these books are set in the Discworld, but form the start of thier own series within the series). Written to a slightly younger audience, they are still highly enjoyable for all ages. Highly recommended in and of themselves, combined in a nice volume for such a low price, they are absolutely worth picking up for any Discworld fans or for anyone who hasn't yet given the Discworld (and Pratchett) a try.