Border guards at Vancouver International Airport made more than 30 drug seizures during the first two months of the year, intercepting suspected narcotics in everything from a hallowed-out book to the sleeves of a cardboard box.

The Canadian Border Services Agency stopped the shipment of more than nine kilograms of heroin, which accounted for the most prolific drug seized at the airport, over the course of 2013.

This included the discovery of 5.1 kilograms tucked away in cardboard in two separate deliveries declared as posters and 4.1 kilograms uncovered inside coffee whitener tubs.

Officers also nabbed opium inside a hallowed book, GBL — a precursor to the date-rape drug — declared as cleaning solution and ketamine declared as industrial chemical.