Books by Hektor Drongubosch

2 titles available, newest first by original publication date.

Math Unlocked: Secret Shortcuts, Clever Tricks, and Real Confidence for Grade 7 Mathematics cover

Math Unlocked: Secret Shortcuts, Clever Tricks, and Real Confidence for Grade 7 Mathematics

Hektor Drongubosch

$13.99

The Secret Order of Numbers: How Primes, Infinities, and Hidden Patterns Secretly Run the Universe, Your Money, and Your Mind cover

The Secret Order of Numbers: How Primes, Infinities, and Hidden Patterns Secretly Run the Universe, Your Money, and Your Mind

Hektor Drongubosch

$13.99