Zany time-western, based on the premise (similar to Dark Tower, and some others) of “what if there was a place that connected all times and places?” In this case, instead of Mid-World and the Dark Tower, the place is a road network centered on a freeway running through all time. I gotta wonder how much King's Dark Tower was inspired by Roadmarks. There's abandoned robots and other AIs, ruins, anachronistic and futuristic technologies, people out of place and time wandering through, an occasional inn to stop off in, and finally there's the one forgetful wanderer on a half-remembered quest. All the historical figures anachronistically existing side by side reminds me a bit of the short story “Mozart in Mirrorshades.” If you've read the later Earthsea books, you will be prepared for the ending with the dragons. The road that stretches away out of our perception and the process of finding it kind of reminds me of LeGuin's The Beginning Place. A very fun read.