Lectures preparing for American Invitational Mathematics Examination (AIME) with plenty of problems with detailed solutions. In the book, each chapter has three parts: (1) knowledge part talking about theorems, formulas, and skills with examples, (2) problems, (3) solutions to the problems. Topics include: Solid Geometry - Cube and Prism Solid Geometry - Tetrahedron Counting with Solid Geometry Plane Geometry Similar Triangles Plane Geometry Area and Area Method Plane Geometry Menelaus and Ceva Algebraic Manipulations Logarithms Solving Equations Cauchy Inequalities A newer version can be found: https: //www.amazon.com/American-Invitational-Mathematics-Examination-Preparation/dp/1534980962