- Algebra, the easy wayDouglas Downing
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- Dictionary of mathematics termsDouglas Downing
- Barron's E-Z algebraDouglas Downing
- Dictionary of computer termsDouglas Downing
- Trigonometry the easy wayDouglas Downing
- Computer programming in Java, the easy wayDouglas Downing
- Business statisticsDouglas Downing
- Computer programming in BASIC the easy wayDouglas Downing
- Forgotten statisticsDouglas Downing
- Calculus by discoveryDouglas Downing
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- E-Z trigonometryDouglas Downing
- TrigonometryDouglas Downing
- Computer programming in Pascal the easy wayDouglas Downing
