Herbal by Deni Bown (Pavilion, £25) This thoughtful blend of history, folklore, serious herbal medicine and horticulture not only explains how to use the herbs in your garden but reveals the origins of the herbs you take along with your vitamins. It's reassuring, for example, to find that my kava kava, a relation of pepper, has been clinically proved to be as effective as modern pharmacology at reducing anxiety - and without the side effects. Comprehensive, beautifully illustrated, encyclopedic but easy to read.