James acclaimed debut book The Energy Plan (Penguin Random House) is available now in paperwork, ebook and audiobook formats.

‘James's pioneering use of food as fuel has transformed players' performances – and now he can do the same for you.' – Arsène Wenger OBE

'After following James’s plan, I had so much more energy and felt at my peak physically.’ – Alex Oxlade-Chamberlain, Liverpool FC & England