Full Frontal Calculus | Braver New Math Mathematics books by award-winning author Seth Braver, including Full Frontal Calculus, a free, high-quality, calculus textbook based on infinitesimals
Ill Enough Alone | Bravernewmath Ill Enough Alone is without doubt one of the books I have ever read - Tom Lehrer, composer of An Evening Wasted with Tom Lehrer