Looking for the perfect gift? When purchasing the book [psi] in the month of December, you receive two copies for the price of one.
Looking for the perfect gift? When purchasing the book [psi] in the month of December, you receive two copies for the price of one.
One-time offer
Add a second copy at 50% off and we'll include the PDF Explanations (€49 value) for FREE.
Gift copy + free PDF
CHF 45.06
CHF 90.12
PDF Explanations (€49) included free
PDF Explanations
CHF 39.00
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