Goodreads asked Stephen Perrenod:

Where did you get the idea for your most recent book?

Stephen Perrenod I was thinking about writing a book on how galaxies form and evolve, but this is a highly technical cutting edge topic. I decided before that I would create something with much broader appeal. Some searching indicated there weren't many options for a book dominated by beautiful images of galaxies, plus I wanted to target for the iPad - kind of a coffee table book for an iPad.

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