The Fire Came By: The Riddle of the Great Siberian Explosion, by John Baxter and Thomas Atkins, Doubleday & Company, Inc., 1976 hardcover ed., 165 pp., w. index and extensive bibliography.
If you are interested in meteors and comets (or unexplained celestial phenomena), this is a "must have" book for your library. Tracing the history of the great Tunguska event of 1908, it provides an extensively documented narrative of eyewitness accounts and follow-up expeditions to this inaccessible region of the Siberian tundra.
Even if you don't accept the authors' conclusions about the specific nature of this event -- i.e., the object was a vehicle from another world -- this well written book is nonetheless exceptionally valuable for the historical and evidential background that it provides.
This book is an extra copy from my reference library, and is in new condition with a crisp dust jacket (there is a very slight tear in upper spine of the dust jacket). Asking $12.00, including shipping via media mail.
Thanks for looking.
Milt Hays, Jr.
1457 Avondale Ave.
Jacksonville, FL 32205