Where do you buy your books online?
Waterstones
The Tunguska Mystery – Astronomers' Universe by Vladimir Rubtsov, Hardcover ?26.99
Amazon
The Tunguska Mystery (Astronomers' Universe) by Vladimir Rubtsov, Hardcover ?25.64
Book Depository
The Tunguska Mystery – Astronomers' Universe by Vladimir Rubtsov, Hardcover ?14.85
Worth shopping around and not going for the obvious!