List of Collins GEM books

Collins GEM is a collection of miniature books and dictionaries by HarperCollins.

With the invention of steam presses in the 1860s, Collins became able to publish books and dictionaries in all sizes.

Others covered quotations, first names, synonyms and antonyms, spelling and word division, and crossword puzzles.

In the 1980s Collins Gem guides were updated and expanded with extensive colour illustrations.

There was a further modernisation and re-design in the Spring of 2004, including a new cover design, new internal layouts and a size increase to 4.6 high by 3.2 inches wide.