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This book is dreadfully boring. I've read many books from the Grand Tour series and enjoyed them all until I read this one. This book has way too many characters in it. Too difficult to keep up with who's who. There didn't seem to be a clear protagonist in the book until well into the story. There were also way too many disparate (and dull) plotlines that took forever to come together. I like Ben Bova, but this one's a dud!