To support customers at this time we’re offering free standard delivery on orders with a subtotal over $89. Simply spend $89 or more in one transaction on eligible products and have your order delivered to any address in Australia and New Zealand for free.
For order values under $89, a flat standard delivery fee of $9.99 applies no matter where in Australia or New Zealand.
Eligible products include Books, Audio CDs, Stationery and Diaries available on the Booktopia website, excluding: eBooks, Audiobooks, eTexts, digital subscriptions and gift certificates.
Offer ends 31 April 2026 at 23:59 pm (AEST). Your eligible Standard delivery fee will be automatically waived at checkout for orders over $89.
This offer is subject to change without notice. Booktopia reserves the right to adjust or retract this offer at its discretion. Please visit our terms and conditions for more information.
![Caesura in Cryptography [Paperback] : My first Workshop about Encryption - An Introduction with Teaching and Learning Material for School, University and Leisure.](https://www.booktopia.com.au/covers/150/9783751989497/1023/caesura-in-cryptography-paperback-.jpg)
