I thoroughly enjoyed this book. I have not yet gotten around to reading The Da Vinci Code, also from Dan Brown- I do own it, I just haven't gotten around to reading it yet. Digital Fortress however piqued my interest because it related directly to computer and network security.

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Man Plus is a 1976 science fiction novel by Frederik Pohl. It won the Nebula Award for Best Novel in 1976 and was nominated for the Hugo Award for Best Novel in 1977. Pohl teamed up with Thomas T. Thomas to write a sequel, Mars Plus, published in 1994.

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The Forever War is a 1974 science fiction novel by Joe Haldeman. It won the Nebula Award in 1975 and the Hugo Award in 1976.

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Childhood's End is a science fiction novel by Sir Arthur C. Clarke, dealing with the role of Mind in the cosmos, and the plausible implications of that role for the evolution of the human race. It was originally published in 1953.