3. eBook on Geometry, Co-ordinate Geometry and Solid Geometry (Mensuration)
This eBook with over 200 pages covers basic to advanced concepts in Geometry including lines, triangles, polygons and circles.
The chapter on co-ordinate geometry starts by introducing basic concepts such as finding distance between two points, testing for collinearity.
The chapter on Solid Geometry includes different units of measurements, formulae to compute surface area, volume, and area of cubes, cuboids, cylinders, cones, sphere and hemisphere.
The book contains over 50+ solved examples and illustrative examples, 60+ exercise questions from these three topics.
Easy to download Math eBooks on select high scoring topics. Number Theory, Inequalities, Permutation, Probability, Geometry. $6.99 each 
Lesson Books for GMAT Math. Set of 5 books. Formulae, examples, exercises, shortcuts, tests. Rs.1650 within India. US $89 outside India.
Intensive 
GMAT MATH topic wise e-books
Aiming to max your score in GMAT Math?
This eBook covers all the topics in Number Theory and Inequalities related to GMAT. Explanation of topics provide in-depth knowledge of concepts such as LCM, HCF, remainder theorem in number theory and the rules governing inequalities. 
This ebook with over 110 questions in about 100 pages covers all major concepts in Permutation combination (combinatorics) and Probability. Includes typical GMAT like problems such as "tossing of coins", "rolling of dice" and "selecting cards from a pack of cards" 
This eBook has a test comprising 95 questions on Permutation, Combination and Probability. Each of the questions is an objective type multiple choice question. Each question is provided with correct answers and detailed explanations at the end of the test. Shortcuts, wherever applicable, are provided alongwith the explanatory answer to the questions.
This ebook with about 110 questions in over 200 pages covers all major concepts in Descriptive Statistics (Mean, Median, Range, and Deviation). Includes typical GMAT type questions in both Problem Solving and Data Sufficiency formats.