The Wee Free Men: The Beginning
Terry Pratchett
583 pages
When Tiffany Aching sets out to become a witch, she faces ominous foes and gains unexpected allies. As she confronts the Queen of Fairies and battles an ancient, bodiless evil, she is aided (and most ably abetted) by the six-inch-high, fightin', stealin', drinkin' Wee Free Men! Laugh-out-loud humor and breathtaking action combine in the books that launched the unforgettable adventures of a determined young witch and her tiny but fierce blue friends.
If you're feeling out of sorts, The Wee Free Men is a perfect place to start. It was meant as a young adult series, but it's enjoyable for adults too, especially in audiobook form.
Discworld is a vast and fascinating universe, and 'Wee Free Men' is a great entry point coming off Harry Potter, showcasing Pratchett's excellent writing.