This is my favorite little gardening book! The chatty style and great attention to detail make this a very accessible book for newbies. He includes enough interesting details and asides that even experienced gardeners are sure to be entertained & to learn something new.
This is a fabulous resource for anyone who has been purchasing herbs by the pot at the LGS, thinking they could never grow their own. He'll get you to the point where you can pick up one thyme plant at a nursery and envision it turning into a border, rather than trying to figure out how you'll be able to afford 10 thyme plants and still purchase anything else. Once you start propagating, your collection of various herbs & cultivars may grow rather rapidly!
The propagation techniques in this book aren't limited to herbs, either. I've used his transplanting methods on other flowers and veggies, and his descriptions of dividing & layering techniques apply to many perennials & shrubs.
Much of this information is also contained in chapter 7 of _The Big Book of Herbs_, but the less formal style and the handy charts make "the little book" a good one to have on your shelf as well.