You probably want to include a short description of the book here. Like a blurb on the back cover. It can be as long or as short as you’d like. You probably don’t want 4+ paragraphs, but it would be good to let patients know what they’re downloading.
Do you want to include any other information on the website? Links to other resources?
Do you want to include another page on the website about who you are? For example, if a patient shares this website with their family or friends (but they don’t know you). Remember this website may reach many people - not just your patients.