Rick Steves’ Europe Through the Back Door
Rick Steves self-published his first European travel guide in 1980, and it found a traditional publisher in 1982. He advocates independent travel, and urges travellers to visit less touristy places (Lorelai and Rory apparently ignore this advice). He hosts travel shows on TV and radio, has his own tour business, a travel website, and of course, writes numerous travel guide books.
The Rough Guide to Europe on a Budget
Rough Guides Ltd is a British travel guide book publisher; their first title was the 1982 Rough Guide to Greece. Initially aimed at low-budget backpackers, the guidebooks have incorporated more expensive recommendations since the early 1990s, and are now marketed at all budgets. This makes it seem like a rather outdated reference for this episode, although it was probably a book that Lorelai considered in the 1980s, when she first thought about going to Europe as a teenager.
The Annotated Gilmore Girls 