The first Tamblyn edition was a famous cook book first published in 1945 and still in print. In 1950 Collins published its White Circle version of Kate Aitken's Canadian Cook Book as no. CD445. The Tamblyn edition was published the same year with two cover variants.
The next came in 1951 with the paperback original Lovely You (C.D. 528). The editions had identical covers, with "Tamblyn Edition" replacing "A White Circle Pocket Edition"
The final three were published as paperback originals. The first, in 1953, was Kate Aitken's New Cook Book, a new edition of the 1945/1950 original. The next, also 1953, was Canadian Etiquette for Daily Living. I don't have a copy of the cook book. The final Tamblyn edition It's Fun Raising a Family came in 1955. The White Circle line ended in 1952 so the Collins editions for the three books were referred to as "A Collins Book".