Books here are sold by enquiry
There is no basket and no checkout on this site. Every book is a single copy, and at these prices the right way to buy one is to write first, ask whatever you need to ask, and then see the book in person before any money changes hands.
Write to towersmacro@gmail.com. I am glad to answer questions of any level of detail and to send further photographs of any leaf, at any magnification.