Alexey Leonov was also supposed to be the commander of the first Soviet lunar mission.

He and David Scott (Apollo 15) together have written a book 'Two Sides of the Moon: Our Story of the Cold War Space Race.'

https://www.amazon.com/Two-Sides-Moon-Story-Space-ebook/dp/B...

I can recommend some books about the era that are very good reading.

http://www.amazon.com/The-Last-Man-Moon-Astronaut/dp/0312199... written by Eugene Cernan (the last man on the moon)

http://www.amazon.com/Flight-My-Life-Mission-Control/dp/0452... written by and about mission control

http://www.amazon.com/First-Man-Life-Neil-Armstrong/dp/B001O... about Armstrong but representative of many astronauts (and the only book Armstrong cooperated with)

http://www.amazon.com/Two-Sides-Moon-Story-Space/dp/03123086... about the US and Soviet perspectives written as a collaboration between an astronaut and cosmonaut

Current era:

http://www.amazon.com/gp/product/0393339912 This one is also a good read which roughly summarises our current knowledge about having people live for over a year in space (how long it would take to get to Mars). (Spoiler: not much)