If you want to create your own workbook, you can download a master tournament file from a database and use software like ChessBase to run a tactical analysis that isolates critical calculation moments.
2. Chess Calculation Workbook / Grandmaster Training Camp (GM Sam Shankland) Download Calculation Workbook for Tournament Players pgn
A video course and training pack curated to teach players a concrete calculation formula similar to strong Grandmasters. If you want to create your own workbook,
Sites like PGN Mentor offer massive, free archives of specific players and classic tournaments. You can download these files and "mine" them for tactics to calculate. Sites like PGN Mentor offer massive, free archives
A super-intensive calculation workbook designed by Olympic gold medalist Sam Shankland. It covers deep calculation, candidate moves, and defensive resources.
Several highly regarded chess resources match the description of a calculation workbook tailored for tournament players.