How many books did isaac newton publish?

Sir Isaac newton wrote several scientific works. These principally include:

• On the Motion of Bodies in an Orbit
• Mathematical Principles of Natural Philosophy
• Optics
• Universal Mathematics
• Optical Lectures
• On the System of the World

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He also had several nonscientific works. Newton also wrote extensively about differential calculus, however he did not publish a single text on the subject - his writings on calculus were often embedded in other texts, or presented as letters to his scientific peers.