We'll begin with the main characters of this book.
If you're a sci fi fan, these two look familiar. Actually, many of my inspirational actors and actresses probably look familiar. Nick Tanner is without question a character personification of Richard Dean Anderson from his Jack O'Neill stage on SG-1. All that sexy silver hair and sexy arms and... *ahem*... sorry. Tangent there. And his Caitlin is Amanda Tapping, also known as Sam Carter on SG-1. Worked out well like that.
Because Michael is Nick's son, and often said to look just like Nick twenty years younger, Michael is in essence also inspired by Richard Dean Anderson. Just more of a MacGyver era versus SG-1. Michael perpetually has his hair too long, and is slow to smile, but he's brilliant and has a heart so pure it's fascinating.