Affreschi: Exploring Etruria is the only travel book I know that focuses on the land of the Etruscans, also known as Etruria.
Before the Romans came along, the Etruscans ruled a wide domain, which stretched from Rome to southern Tuscany and east to Umbria. Author Mary Jane Cryan profiles these areas, including the towns of Civitavecchia, Cosa, and Tarquinia, as well as the villages around Lakes Bracciano, Bolsena, and Vico.
My copy of Affreschi, published in Italy in 2001, is unfortunately out of print. But apparently, a revised edition came out in fall 2006. So, if you’re interested in ancient Etruscan culture or unique day trips from Rome, this may be a great supplement to a general guidebook.
Information is available on the website Elegant Etruria.