What, no fiction?
Promise & Prestidigitation. This long and intricate love story involving an impoverished but bright wizardress and an arrogant but good-hearted wealthy noble wizard has been passed around many times among wizards in magical colleges, and has inspired many, many imitators. From the opening line, "It is a truth universally acknowledged that a young wizard in possession of a good fortune must be in want of a spouse", to the happy ending, the book is acclaimed for its literary values and one can often find well-thumbed copies of it in any wizard's library.
Archmage of the Rings. This long, realistic story of a group of junior wizards on a quest to destroy a cursed relic with only the occasional warrior to deal with nonmagical threats is acclaimed for its psychological realism, and is well-known for starting off the lengthy trend of gritty stories about wizards and other magic users struggling with the difficulties of dealing with magic use in the modern era. It's particularly notable for its many well-rendered accounts of love affairs between the characters.
Fifty Shades of Gray Ooze. This notorious text is long execrated for its literary style (or lack thereof), but is nonetheless well-known to be very popular and often found hidden behind other books in a sufficiently large library. The plot involving a young sorceress and a plasmid with singular tastes is despised by all wizardly authorities, not least because its invocation of an 'inner goddess' is feared to invoke rivalries with the always-magophobic clerical groups. (The use of rings of regeneration in connection with certain acts was also feared to start an unfortunate trend.)
Papers & Paychecks. This complicated game involving the use of dice seeks to simulate the adventures of people in a low-magic or no-magic world, with the success or failure of an action dependent on numerical checks against characteristics. Magic is replaced by "technology", a complicated form of artificing which makes use of the natural properties of substances without access to the magical Weave. It is known to have enthusiasts among many wizards, oddly enough. Newer editions under the titles Cellphones & Computers and Smartphones & Social Media, add new forms of "technology", and changes to the imaginary society of the game. Response to these has been mixed among the enthusiasts of the game, and has even led to the emergence of 'Original Technology Return' versions jettisoning some of the newer forms of "technology" and more similar in rules to older versions.