If you want to purchase the Dodydocor Ebook you can buy it from Amazon:
https://www.amazon.co.uk/Bodydoctor-Fitness-Nutrition-Programme-Marshall-ebook/dp/B009KP8J04/ref=sr_1_3?dchild=1&keywords=bodydoctor+david+marshall&qid=1626963027&sr=8-3

Or from Apple you can search for “Bodydoctor David Marshall” via Itunes or your iBook app