One of the best is 'Batman: The Long Halloween'. It features Scarecrow among other iconic Batman villains. The story is a noir - style mystery that unfolds over the course of a year, with holidays as a backdrop. It delves deep into the criminal underworld of Gotham and shows how Scarecrow fits into that dark tapestry.
'Batman: No Man's Land' is also a great pick. The story takes place in a Gotham that has been cut off from the rest of the world. Scarecrow thrives in this lawless and desolate environment. It gives a different perspective on his character as he takes advantage of the fear and despair around him.
Definitely 'Batman: Year One'. Although Scarecrow doesn't have a huge role, his cameo and the implications of his existence in Gotham at that time are interesting. It sets the stage for future encounters. Also, 'Scarecrow: Year One' which focuses specifically on his origin story. It shows how he became the master of fear that he is in the Batman universe.
One of the best Scarecrow stories is 'The Long Halloween'. In it, Scarecrow adds to the overall sense of dread and mystery in Gotham. His fear toxin is used to great effect, making it a great read for Batman fans.
Another notable one is 'Batman: The Long Halloween'. While it's not solely about Scarecrow, he plays a significant role. This graphic novel is a classic that shows different villains in Gotham and how they interact with Batman during the holidays. The character development of Scarecrow within it is quite interesting as he adds to the overall sense of dread in Gotham.
The plot mainly revolves around Batman's encounters with Scarecrow. Scarecrow uses his fear toxins to spread chaos in Arkham. Batman has to face his own fears while trying to stop Scarecrow from causing more harm to the city.
In many Batman graphic novels, Scarecrow starts as a relatively simple fear - mongering villain. For example, in his early appearances, he mainly uses his fear toxin to cause chaos in Gotham. But as the stories progress, like in 'Batman: Arkham Asylum - A Serious House on Serious Earth', his character becomes more complex. He is not just about spreading fear physically but also mentally torturing Batman, showing a deeper understanding of Batman's own fears.
I also highly recommend 'Arkham Asylum: A Serious House on Serious Earth'. It's a very different take on Batman, set mainly within the walls of Arkham Asylum. The story is complex and the art is quite disturbing in a good way, delving deep into the psyches of Batman and his rogues' gallery.
Well, 'The Killing Joke' is a must - mention. It delves deep into the relationship between Batman and the Joker. Then there's 'Batman: Hush' which has a complex mystery and brings in a lot of Batman's foes and allies. Also, 'Batman: The Long Halloween' is great as it shows Batman's early days fighting crime during the holidays and the mystery behind Holiday, a serial killer.