To Open, or Not to Open: Featuring the Rule of 20
To Open, or Not to Open: Featuring the Rule of 20
Overall Rating: 1.4 / 5 (average from multiple review sources, as of 12 Jun 2026)
Based on a total of 63 customer reviews from independent review platforms.
Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.
All brand names and logos are the property of their respective owners.
Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Based on a total of 63 customer reviews from independent review platforms.
Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.
All brand names and logos are the property of their respective owners.
Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Cheapest Price
In stock
Direct debit
Direct debit
Visa
Visa
Mastercard
Mastercard
£17.11
Delivery from £40.00
To Open, or Not to Open: Featuring the Rule of 20
Overall Rating: 1.4 / 5 (average from multiple review sources, as of 12 Jun 2026)
Based on a total of 63 customer reviews from independent review platforms.
Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.
All brand names and logos are the property of their respective owners.
Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Based on a total of 63 customer reviews from independent review platforms.
Sources & Transparency:
The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.
All brand names and logos are the property of their respective owners.
Notice:
pricehunter.co.uk cannot guarantee that published shop ratings originate from consumers who have actually made a purchase from the reviewed retailer.
Cheapest Total Price
Usually dispatched within 8 to 9 days
Direct debit
Direct debit
Visa
Visa
Mastercard
Mastercard
£29.37
Free Delivery
Cheapest offer
Pages: 64, Paperback, Bergen Books
£17.11
In stock
Amazon-marketplace.co.uk
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To Open, or Not to Open: Featuring the Rule of 20 - Details
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We have found 2 prices for To Open, or Not to Open: Featuring the Rule of 20. Our price list is completely transparent with the cheapest listed first. Additional delivery costs may apply.
To Open, or Not to Open: Featuring the Rule of 20 - Price Information
- Cheapest price: £17.11
- The cheapest price is offered by Amazon-marketplace.co.uk. You can order the product there.
- The price range for the product To Open, or Not to Open: Featuring the Rule of 20 is €£17.11to €£29.37 with a total of 2 offers.
- Payment methods: The online shop Amazon-marketplace.co.uk supports: Direct debit, Visa, Mastercard
- Delivery: The shortest delivery time is In stock working days offered by Amazon-marketplace.co.uk.
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