which book did axel smith himself use to train woodpecker method

Sort:
chelsealiang

Recently, stumbled upon the book woodpecker method on chessable and I think it's theoretically a very interesting concept. However its not the book the authors themselves used to gain 3 gm norms, read 13 times and before big competitions.
Does anyone know which book the author themselves used.

Ik why they might not say which book they used (bc they r promoting their own books) but I would still really like to know.

Chess_Player_lol

He probably used a collection of books over the years he used the method.