Project Gutenberg, the first producer of free electronic books, offers more than 33,000 free ebooks of previously published titles, all digitized with the help of thousands of volunteers. Now available is an early road book, Across the Continent by the Lincoln Highway by Effie Price Gladding. Other ebook sites have already taken the file and reposted it but without the images (or I assume permission), and PG warns that these are most likely spammers. You’ll find the safe original here: www.gutenberg.org/files/33320/33320-h/33320-h.htm
As I wrote in my Greetings from the Lincoln Highway book:
Effie Gladding had just returned from three years touring the world when she departed San Francisco on April 21, 1914. She and her husband Thomas first drove the El Camino Real 600 miles south before turning and meeting the Lincoln at Stockton. In a 262-page book she titled Across the Continent by the Lincoln Highway, she doesn’t reach the focus of her title till page 108, then detours off it for another 47 pages near the end, skipping most of Ohio and Pennsylvania. But it was the first full-size hardback to discuss transcontinental travel, as well as the first to mention the Lincoln Highway.
Click the link above or go to Project Gutenberg’s main page for the book for other ways to download the text and images.