Really?! Good to know!As in novels or RPG book?
Novels the essential reading is the Chronicles trilogy, followed by the Legends trilogy. That’s the core of the setting and all you need.
The core adventure series is for 1E, but has been updated/revised/compiled a few times. Not for 5E though.Really?! Good to know!
mad far as RPG books, what should I read? What adventures are iconic or the best ones. What should or can I avoid?
Outside Chronicles I was going to recommend Legend of Huma and Kaz the Minotaur too!The novels? The main ones are the original Chronicles trilogy and then the Legends trilogy. See DragonLance - Book Series In Order
After that you can pick and choose what you like. One problem is Dragonlance kept on having world-changing events, so I don't know which era your table is playing in. My favorite is the time just after those first two trilogies.
Novel-wise, I quite liked Legend of Huma and Kaz the Minotaur. But I have fond memories of all the early 90s novels.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.