This is the graphics library user disk from Mirrorsoft Fleet Street Publisher.
From Wikipedia...

Fleet Street Publisherwas anAtari STdesktop publishingprogram produced byMirrorsoftin theUnited Kingdomand released in November 1986. AIBM PC compatibleversion produced byRowan Softwarewas planned for 1987[1]but never released.

Running underGEMthe program offered features such as multi-column text, the ability to design flow charts and graphics and multiple document sizes (flyers, menus, cards, etc.). Possible font sizes ranged from 4 to 216pointswith support foraccented characters. Character and line spacing where fully controllable by the user. The software came with a 150 imageclipartgallery.[2]

The software was superseded byTimeworks Publisher(Publish-Itin the United States), which the market regarded as a much better product. This new version was produced byGST Software Products, and upgrades for the PC versions were available into the late 2000s.[3][4]