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If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
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All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
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Thoughtful and articulate study of the origin of ideas. Role of the unconscious in invention; the medium of ideas do they come to mind in words? in pictures? in mathematical terms? Much more. 'It is essential for the mathematician, and the layman will find it good reading.' Library Journal.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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