I read a republished Science fiction novel that originally 1987 called Twistor by John Crammer it was an interesting look at physics and alternate universes . I really enjoyed reading this book. I hope I can find Einstein's bridge at the library sometime .
Minor correction: the author's name is John Cramer, with just one "m."
He's also a noted physicist and professor as well as a writer, and knows more about cutting-edge physics than I will ever know. I still remember him trying to explain quantum entanglement to me back in the eighties.

FYI: his daughter, Kathryn Cramer, is a noted SF editor and anthologist in her own right (and an old friend of mine).
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