17:36

[A collaboration with Gento Kono!] A thorough explanation of the revolutionary new mathematics te...

14:34

[The most difficult science textbook] The 4 most difficult functional theory reference books! A t...

14:32

[The next generation ace!?] SuperQuick explained

15:29

[The Ultimate Book] Which math textbook has saved so many students? We'll reveal them all in rank...

15:50

[Explanation for all subjects] How many years back can past exam questions be used to prepare for...