I have revamped my earlier sets of pages to include a leading critical article on the announcement for my late mother's funeral. The Family-Background article mentions the brain scan I had done in 2017. This alters the situation as I described it in my book of 2016. There is also a blog post on that topic.
I have three electronic formattings available of the book (Mobi, Epub and PDF). Readers are available for these in all mobile and desktop environments. Buying from Amazon is an option especially if you have a Kindle device; and indeed purchasing from this site would require that you navigate within the Kindle device in order to upload the item, whereas this is done fairly automatically if you purchase from Amazon.
I started off doing sales from this site, but Amazon is more currently a very satisfactory sales outlet for me to use. Whichever e-commerce software or system I try to use for this site, it is always a hassle.
A consistent and small number of people want the PDF version. But the contact form can be used by anyone who wants a copy from me; and, as for payment, that depends somewhat on how easy that would prove to be. Gratis is an additional possibility, too.