Toketa? is the self publishing puzzle book written by Japanese puzzlers and Serkan Yurekli.
"Toketa?" means "Could you have solved?" in Japanese. . All articles are in Japanese, but English instructions are available since issues 2(you can download English instructions for issues 1 here). Each issue contains various types of WPC-style puzzles. You can check the puzzle types and some samples.
Toketa? vol. 11 info online shop e-book
Toketa? vol. 7 info online shop e-book
Toketa? vol. 6 info online shop e-book
Toketa? vol. 5 info online shop e-book
Toketa? vol. 4 info online shop e-book
Toketa? vol. 3 info online shop e-book
Toketa? vol. 2 info online shop e-book
Toketa? vol. 1 info online shop e-book