*Valid September 30, 2024 - December 25, 2024 at Canadian stores and at indigo.ca, while quantities last, with $50.00 or more pre-tax purchase of eligible product(s), after discounts and plum points redemptions. Minimum purchase amount excludes gift cards, plum+ memberships, Love of Reading products/donations, and shipping costs. Selection may vary between stores and online.
A Key to a Treatise On Arithmetic/en-ca/a-key-to-a-treatise-on-arithmetic/39E70A41-162A-411C-86F2-A763B0EE1DE5.html39E70A41-162A-411C-86F2-A763B0EE1DE5