THE WAR IS OVER, BUT THE FIGHT CONTINUES. In the latest book in the Alex Kovacs thriller series, the site is a new one but the problems are old. Alex finds himself in Tallinn, the capital of Estonia, doing the kind of Cold War espionage work -- chronicling train arrivals and shipments and the like -- that is mundane on the one hand but viewed as vital in the struggle against Soviet oppression. The complications are numerous, though, because of Estonia's...