Quickly and accurately calculate key investment ratios Written by a leading finance expert, this book offers simple explanations on how to calculate and interpr

Magical see-through pages flip back and forth to mix and reveal counting surprises.

This “enjoyable” biography of the brilliant astronomer will intrigue young people who are “bored with the textbook approach to science” (The New York Ti

If you found maths lessons at school irrelevant and boring, that’s because you didn’t have a teacher like Bobby Seagull. ***As seen on Monkman & Seagull's G

Martin Gardner's Mathematical Games columns in Scientific American inspired and entertained several generations of mathematicians and scientists. Gardner in his