Conceptual Trigonometry Part I
TWINS : Part Two - Books 4, 5 & 6
TWINS : Part One - Books 1, 2 & 3
MIND READER : Part One - Books 1, 2 & 3
TWINS : Part Three - Books 7, 8, 9 & 10
MIND READER : Part Two - Books 4, 5 & 6
Mathematics for Engineers and Physicists, Part 3