Arthur Rosenberg, Doubleday Anchor A very excellent, perhaps the best, short history of the revolution. A critical but sympathetic well written account.
The Unknown Revolution
Voline, Free Life Editions, New York Readable, comprehensive and well reasoned. It deals especially with the period before the Revolution (1825-1905), the period of the 1905 revolt, the general Anarchist influence in the Revolution, and the Bolshevik dynamics, as well s the Kronstadt and Makhnovist experiences.