This is the second sentence of the introduction to "Nuclear Energy," which, at $6,232, is Amazon's most expensive Kindle book:
"Since long time before mankind started to develop technologies to provide energy from fusion of light atomic nuclei and from fission of heavy atomic nuclei, nature has been releasing energy from fusion and fission processes: Fusion of hydrogen to helium nuclei is the energy source of stars like the sun."
Between the price and the prose, we're pretty sure that any nuclear secrets contained in the book will remain safe.
