It's really a great book, but it does not pretend to be complete. It is done in a conversational style, they each talk about their experience with seed starting in general, and each kind of plant. I feel like I got to go to lunch with two super experienced nurserymen who are exchanging views on seeds they have each grown. It has all kinds of personal tips and tricks. I was looking in it because I am starting to save summer seeds for swapping. I wore out my prior copy, got another one at Half Price Books this year.