[2] A "supermarket edition" of the Lincoln Library was published in 1969 in 14 slim volumes under the title Encyclopedia of World Knowledge, but this was quickly discontinued.

[4] The 1985 edition of the Lincoln Library of Essential Information had 2,500 pages, 25,000 articles, 3.5 million words, 8,800 cross-references and a 75,000 entry index.

[8] Controversial issues such as abortion, adoption, birth control, religious cults, capital punishment and homosexuality were avoided.

[9] Despite its continuous revision the set was criticized for being out of date - contemporary events were cataloged, but "standard material" did not keep pace.

In the late 1980s and early 1990s some firms had expressed interest in buying the Lincoln Library of Essential Information brand, but by 1994 nothing had come of this.