Only for the well-heeled, Serjeant & Lewcock's San'a - an Arabic Islamic City is a gorgeous limited-edition that will tell you everything you've ever wanted to know about the city.Jacques Hébert's Yemen - Invitation to a Voyage in Arabia Felix is a general guide to the north of the country. It's got some great photographs.If you want to know more about Yemen's social lubricant, don't go past Shelagh Weir's Qat in Yemen - Consumption and Social Change.Eric Hansen's Motoring with Mohammed is an hilarious travellogue of Yemen.The classic of Yemeni history is Carsten Nibuhr's Travels Through Arabia, first published in 1792. Freya Stark's The Southern Gates of Arabia tells it from a woman's point of view, while Fred Halliday's Arabia Without Sultans will bring you up to date.