Karen,
I think it has to be a book that you write, because it needs to begin with your individual tastes. And it is a book that you continue to write.
I am a very small hybridizer. When I think back on my personal journey, it is more about people than anything else. I have been blessed with great mentors (John Rice, Curt Hanson, Judy Davisson) who have been so generous with their knowledge and experience. You need a mentor!
Secondly, as I look back at my beginnings, I can see that there have been enthusiasts who have gone on this small path with me. Daylily nuts who were starting at the same time, sharing their wild excitement of first seedlings to bloom, what crosses to try, what crosses not to try...lol. These folks (Brent Bryson, Paul James, Ronie Johnston, Sally Marcum, Robin Nichols, Sandy Ellis, Marri Kelly Banks, Deb Carriker, Greg Zapel, Robert Rioux, and James and Peter right here) are also important for this journey...in that they help give this pursuit a sense of "what did ya get" excitement! You need a posse...lol.
Get ready to enjoy the ride, Karen!