Thank you Corey for the link. Every link or suggestion I get is very helpful to decide whether I will write a book or not.
Some say: go on Jonna! , some say: There is already so much written about it, so you won't add anything new!
I really have to evaluate all reactions, try to find the books suggested and read them.
I will rule out all books that are written by professionals and for professionals. If I decide to write a book it will be not scientifical, just my experience as being a starter once and I would like to add a lot of pictures and just a few text. So, I'm mainly looking for books for real starters. I was a starter once and I would like to find a book that would have helped me in the beginning. A lot of books for starters are mainly about vegetables. Although I want to mention those in my book, the main thing will be growing ornamental plants, I live in a region where only some vegetables will set seed, so I can never write a book about growing, seeding and harvesting vegetables in general. But I can write about ornamental plants, saving seeds from it, growing them from seed, sowing in vermiculite, wintersowing, etc., but also want to show a lot of pictures of seeds and seedpods and show how plants finally will grow in the garden.