Currently reading the Grant Morrison/Vertigo run from the 80s and 90s. I was planning on then going straight to the Young Animal run. I know there were a few other Doom Patrol series in between. Are any of them essential to read before starting the Young Animal run? Are any of them worth checking out even if they aren’t essential?
The 2004-2005 series by John Byrne is worth checking out, as is the story that lead up to that book, The Tenth Circle, from JLA (1996-2006) #'s 94-99, written by Chris Claremont and drawn by Byrne, also featuring the Doom Patrol.