You're referring to the article "Assimil Italian Without Toil"! That's a fascinating topic.
While modern editions like Italian with Ease are more common, the 1957 vintage PDF version remains highly sought after by polyglots for several reasons: Reddit·r/italianlearning Assimil Italian Without Toil.pdf
Would you like a to use with any Assimil Italian book? You're referring to the article "Assimil Italian Without
: Includes over 400 pages of bilingual lessons, grammar notes, and review exercises. and review exercises.