W. Tobman, "Gorbachev: His Life and Times" - Gorbachev's Perestroika. A biography recommended for learning about his life and the historical background of the collapse of the Soviet Union!
The book traces Gorbachev's enigmatic life from 1931, when he was born, to after the collapse of the Soviet Union, along with its historical background.
Gorbachev's own life is very interesting, but what I really appreciate about this book is the historical background of the Soviet Union. In particular, I found the process of the Soviet Union's collapse to be so confusing that I wanted to wrap my head around it. It shows how the Soviet Union was lost in a maze with no way out.