An individual angle
When I set out originally to write and get the book I had written published I knew that competition is fierce and that publishers could ask what is so special about your work then? I knew an individual angle would help me get a deal and I was proved right so am passing this on as advice.
I decided my book, which was eventually published under the title of Herbs of the Northern Shaman, would have the fact that all plants covered in it were ones that grow somewhere in the northern hemisphere.
I knew there were plenty of titles about entheogens and specific mind-altering herbs but none that only dealt with plants from a specific area of the world. My book would include the UK, Europe, Russia, northern parts of Asia, China and the USA.