*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.
Linear System Theory/en-ca/linear-system-theory/4890ABB8-223E-48CF-A5E4-6B3A860E9FEB.html4890ABB8-223E-48CF-A5E4-6B3A860E9FEB