Euclidean Geometry in Mathematical Olympiads by Evan Chen

Solving Problems in Geometry by Kim Hoo Hang

Mathematical Olympiad in China (2011–2014) by Xiong Bin

Problem-Solving Methods in Combinatorics by Pablo Soberon

Combinatorics: A Problem-Based Approach by Pavle Madelovik

Olympiad Combinatorics by Pranav A.Sriram

Math olimpiad algebra by Roman Kvasov

Selection Tests in Number Theory by Corneliu Mănescu-Avram

Problems of number theory in mathematical competitions by Hong-Bing Yu /p>