The publisher's blurb says,
This superb guide at last brings the work of Filippo Coarelli, one of the most widely published and best known scholars of Roman archeology and art, to a wide, English-language audience. Conveniently organized by walking tours and illustrated throughout with clear maps, drawings, and plans, Rome and Environs: An Archaeological Guide covers all of the city's ancient sites, and, unlike most other guides, now includes the major monuments in a large area outside Rome proper but within easy reach, such as Ostia Antica, Palestrina, Tivoli, and the many areas of interest along the ancient Roman roads. An essential resource for tourists interested in a deeper understanding of Rome's classical remains, it is also the ideal book for students and scholars approaching the ancient history of one of the world's most fascinating cities.
At list $24.95 for a 575 page trade paperback ($70.00 for the hardcover) it's quite reasonable in price, too. I'm absolutely unqualified to evaluate it, but it looks potentially very useful for real-life and armchair visitors to the city. The book's page at the publisher's site includes more information about the book, the author and other people involved, and a link to a .pdf file of the bibliography.
Thanks to Lindsay Wong of UC Press for posting the notice to the Classics-l mailing list.