Excerpt:

Everyone loves a good spy story. But it can be hard to tell if the story is fact or fiction; this is especially the case with spy memoirs. Jack Barsky’s page-turning memoir, “Deep Undercover,” has a ring of authenticity to it. Most of the book is written using recreated dialogue, but is it true?

Part of Mr. Barsky’s story was told by “60 Minutes” and it reads like the best of spy fiction: While he was a prize-winning chemistry student in East Germany, the KGB recruited Mr. Barsky to become an illegal agent abroad. An illegal is one of Russia’s most secret agents. The spy is sent to the target country under an assumed identity and is told to build a life acquiring all the necessary documentation.

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