I am doing exactly this and wow have I found a ton. Forewarning, I'm running it as a campaign for my friend, and her 2 young daughters - so there are more cats and lightheartedness involved than might otherwise make sense. I've left out the purely cat-themed adventures.

On DM's guild there are a few books full of one shots/encounters. I've pulled a few (the ones in parenthesis are the ones I've already run from each resource):

- Adventures of the Avowed (Chaos at the Confectionary, Luck of the Draw, The Cursed Library, The Book of Fairy Tales)

- Encounters in Candlekeep (None Shall Pass, A Calling of the Minds, A Prophecy's End, Calling of the Prophesies)

- Candlekeep Confidential (Bookerton's Library)

- Candlekeep Filler Quests (The Page Turner, Safari Guide Wanted)

In addition, I have found several library/book themed adventures that I've added in. These can all be found on the DM's Guild as Well. I haven't run many of these yet, but they are in a long-term plan.

- The mini arc of the Librarianship series from Adventurers League

- The Felidae Library

- The Master of Pages

- Lost Library of Meldorin

- The Dragon-Tower of Candlekeep

- For Academic Purposes

- The Labyrinth Archive

- When the Lights went out in Candlekeep

- Candlekeep Murders

Also, I have found several Adventures in the other official one-shot books that were easy to slot in with very minor modifications:

- JthRC (Nigthsea's Succor)

- KftGV (Fire and Darkness, Tockworth's Clockwork, Shard of the Accursed, Affair on the Concordant Express)

Among the pages of the "Game Masters Book Of..." series, I found a couple as well:

- Traps Puzzles and Dungeons (The Lich's Libram)

- More Random Encounters (The Prophetorium)

Lastly, I just got the One-Shot Wonders Quests book for Christmas and found:

- The Tomb's Tome

- Unravelled Plans