Brochures, Pamphlets, and Catalogs - Handouts given to bookstores and sent on request to readers wanting the current list of Modern Library "Books In Print"
Modern Library in Print Media - How the Modern Library promoted itself "to the trade" and to the public, plus articles written about the ML
Gift Sets - Starting in 1926 and extending into the early 30's, ML offered gift sets as a way of selling the series.
Tie-ins & Private Printings (authorized & not)
Private Printings - ML sometimes rented out its plates for private promotions
Modern Library Style Rip-offs - The Modern Library became quite popular early on. In this article, John Krygier presents graphic evidence showing how rival publishers stole ML binding, end paper, and even dust jacket designs in an apparent effort to capitalize on ML's success.
1932 Direct Purchase Receipt from ML - This receipt, laid in to a copy of a Balzac first, yields some interesting information about (among other things) the availablility of the gift sets into the early 30's.