It's not a particularly good motorcycle book but Zen And The Art of Motorcycle Maintenance by Robert Pirsig is been my go to read for years. It is well written and explores values that seem to be more relivent today. I am a huge fan of Pierson's "The Perfect Vehicle." There is a small book by Theresa Wallach called The Rugged Road. It documents her ride from Londan the Cape Town South Africa on board a Panther 600cc combination and trailer. Then there is the Lois Price book Red Tape and White Knuckles that details her solo ride down the continent of Africa. There is the equally good book Lois on the Loose about her ride down North and South America.