This book's highlight is the story of a mysterious book discovered in 1912 and named for its owner, Wilfrid Voynich. The manuscript has a coded text enhanced by hundreds of illustrations depicting exotic plants, astronomical phenomena and strange "strings of tiny naked women cavorting in a variety of fountains, waterfalls, and pools."

Various experts have attributed the manuscript to Roger Bacon -- but as it has kept its secrets from some of the world's greatest cryptanalysts, including some in the CIA and England's MI-8, as well as the largest supercomputers in the world, the attribution remains speculative. But these efforts make a compelling story for readers of the history of science and of code breaking.