Hello Ilago,

for your ride to Russia I recommend " Off the Map: Bicycling Across Sibiria" by Mark Jenkins. Together with four russians and two other americans Mark cycled at the beginning of the 90s from Wladiwostok to Leningrad (St.Petersburg), which was at this time the very first crossing of Russia by bicycle (which was known). I do not know whether this book was translated into spanish, but it should be available in english and german at amazon!

Bernd