Lonely Planet Food Guides
"These clever handbag-sized guides are perfect for travellers," says Lulu. Covering around 20 destinations, "they contain everything you need to know about the food and eating culture of the countries they cover. Which means choosing off the menu in Hong Kong, Vietnam, Italy and many other places need never be a stab in the dark again". The catch? Most were published between 2000 and 2003 and are now out of print, though they're still widely available second-hand.
www.amazon.co.uk - £3-£25