Unlike many modern textbooks that separate problems by trivial difficulty, Skanavi’s work groups problems by themes (trigonometry, algebra, geometry, etc.) and then orders them from simple to olympiad-level complexity. This structure forces the reader to engage deeply with each topic before moving to the next.

Trigonometry (often considered the hardest section in the book). Stereometry and geometry. 4. The Digital Legacy

The full title of the book typically used by students is by M. I. Skanavi.