Collins Crime Club (1930–94)[5] published all but the first six of Agatha Christie's novels, starting in 1926, as well as the British editions of Rex Stout's Nero Wolfe books and many others from the Golden Age of Detective Fiction.

Between 1941 and 1949, Collins published Britain in Pictures, a series of social history books which were designed to boost morale during the Second World War.

[6][7][8] Collins ultimately became a diverse and prolific company, publishing a wide range of titles, including many aimed at a juvenile audience, such as the books of Dr. Seuss (in the Commonwealth) and Racey Helps in the 1950s.

Collins founded its New Naturalist series of nature books relevant to the British Isles in 1945, with Butterflies by E. B. Ford.

[14] In the mid 1970s, Collins moved all of its operations out of its historic site in the Townhead area of Glasgow, to a new factory in Bishopbriggs.

By the late 1970s, Collins was also responsible for publishing the long-running American Children's Hardy Boys and Nancy Drew series in the United Kingdom.

Collins's Armada Books imprint also published similar series, such as the Three Investigators, alongside such British stalwarts as Biggles, Billy Bunter, and Paddington Bear, and such well-loved authors as Enid Blyton, Malcolm Saville, and Diana Pullein-Thompson.

It publishes print and interactive digital products for primary and secondary teachers in the United Kingdom and internationally.