Hi,
I am an editor working with Dorling kindersley, and if you've read any of DK's books (incl the books on gardening)you'll see that the content is written in a very similar fashion to what you require. I have worked on a number of books covering a wide range of topics like nature, health, science & technology etc. The work that i deliver will be of the highest quality.
I will only be able to work part time on the project, and although i've given a time frame of 30 days it could be more, or even less, depending on the amount of research required for the topics and availability of information.
I look forward to your response
Thanks and regards