Frequently Asked Questions

If you order the eBook, you will be instantly emailed instructions on how to access it after checkout. This email will come from an app named Sky Pilot so please check it doesn't go to spam.

There will be two files available for download:

• PDF - works on any device
• Fixed format ePUB - works best in Apple Books on iPhone, iPad, and Mac

Kindle users should download the PDF and send it to their Kindle library using the Send to Kindle feature found here: https://www.amazon.com/gp/sendtokindle

The eBook is DRM free (no restrictions on device used).

Please reach out via the Contact Page or reply to your order confirmation to change your address before it is posted.

No prerequisite knowledge is required. The book takes a whimsical and fun approach to complex ideas in mathematics and physics. Readers of all ages, including adults, will find it a mind-bending read. Students younger than high school age may find some parts challenging but will still find plenty of enjoyment in attempting to tackle these ideas.

Orders can be canceled within 24 hours of purchase, or modified any time before shipment. Please reply to your order confirmation email or reach out via the Contact Page.

Yes! Parcels will be posted from either a US or Australian location depending on proximity.

Due to high customs costs and delivery issues, we no longer ship to select countries. Thank you for understanding.

We do ship to: Australia, Canada, EU, India, Indonesia, Japan, Malaysia, Norway, New Zealand, Serbia, Sri Lanka, Switzerland, UK, US.

Taxes and duties

• EU, UK: VAT is included at checkout. Nothing extra on delivery.
• United States, Australia: No additional taxes or duties on delivery. Any applicable tax is shown at checkout.
• Other countries: Local customs duties or taxes may apply on arrival.

Yes! Bulk order discounts are on offer for libraries and bookshops. Please reach out via the Contact Page to discuss pricing and special offers.

No, there is no audiobook because this book is highly illustrated. People who pre-ordered the book were gifted bonus audio content but it was an adaptation of another story.

All orders are sent within a few days of purchase. If you placed an order a while ago and haven't recieved your book yet please let us know via the Contact Page and we will arrange for a replacement to be sent. There have been some issues with the international courier losing parcels.