The Caro Kann defense is, without a doubt, a very solid opening choice. Black usually has a good counterplay and no pawn weaknesses. It has been a favoured openig for many top players, including Mikhail Bolvinnik, Garry Kasparov (in his younger years) and Anatoly Karpov. It is the latter in particular who championed the opening and it has become closely associated with the former World Champion. In two volumes, only available at the moment in Russian, Karpov gives the ultimate reference on the Caro Kann Defense, covering his own and many other games.
Anatoly Karpov is a living legend of the chess; he has dominated the world of the chess for over a decade as the world chess champion between 1975 and 1985. Garry Kasparov, the current champion, dethroned him and the two ideologically opposed Russians have had a bitter rivalry ever since. Anatoly Karpov is also the winner of the largest number of tournaments in the history of the chess, with more than 160 due tournaments. He is considered the best positional player of history of chess and is the author of several other books on chess theory.