IMO (International Mathematics Olympiad) is an international competition for high school students that conducted annually to identify and support the mathematical creativity children in schools across the world. Are you preparing for the International Mathematics Olympiad? Do you worry about how to prepare well for the international competition? If so, we provide some of the best books for IMO preparation. In the heavy competitive world, it is vital to plan appropriately and wisely for the exam. You can find many books and study materials in both online and traditional store. Therefore, it is hard to choose the best books so that we are providing some best books for IMO preparation based on your requirements.
Name of the Subject 
Name of the Books  Authors Name 
Details 
Logical reasoning

The Official Olympiads’ Book of Reasoning

MTG Editorial Board

This book designed for students appear for Mathematical Olympiad. It has solved example along with detail solution. It also has several practical questions 
A Modern Approach to Verbal & NonVerbal Reasoning  Dr. R.S Aggarwal

The book contains both verbal and nonverbal reasoning questions with a hint. It boosts your logical reasoning skill  
Mathematical reasoning

Inequalities: A Mathematical Olympiad Approach  Radmila Bulajich Manfrino, Jose Antonio Ortega, Rogelio Valdez Delgado  It makes you understand both new and old method of algebraic inequality concepts easily 
Functional Equations: A Problem Solving ApproachÂ – (Prism Books)  B.J. Venkatachalam

Clear all concepts of functional equation easily  
Number Theory Structures, Examples, and Problems  Titu Andreescu, Dorin Andrica  It is an excellent book for number theory with examples and problems  
Everyday mathematics 
A Beautiful Journey Through Olympiad Geometry  Stefan Lozanovski

Avail the book online for free to learn everything in Geometry

Problem Primer for the Olympiads

C.R. Pranesachar, B.J. Venkatachala, and C.S. Yogananda  Helps students to prepare well for IMO


Proofs that Really Count (The Art of Combinatorial Proof)  Benjamin and Quinn

Perfect book to learn Combinatorics completely with solved examples  
Achievers section 
Problem Solving Strategies For Efficient And Elegant Solutions (A Resource For The Mathematics Teacher)  Alfred S. Posamentier, Stephen Kruli

Improves your problemsolving skills

High school Olympiads trigonometry  Art of problemsolving

It helps you solve different levels of trigonometry questions quickly  
Lecture Notes on Mathematical Olympiad Courses  Xu Jiagu  It helps you gain some indepth and clear understandings of various mathematical section 
Note: Mathematical reasoning, Everyday mathematics, and Achievers section have the same syllabus but their level of question is quite different.
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