Killer Sudoku for Beginners, Book 3Ella Macmillan, Robert Macmillan · First published 2020 · Latest edition 2021Open the Tome
Killer Sudoku for Experts, Book 1Ella Macmillan, Robert Macmillan · First published 2020Open the Tome
Killer Sudoku, Intermediate Level, Book 1Ella Macmillan, Robert Macmillan · First published 2020Open the Tome
