Top products from r/LegendsOfTomorrow

• Grant Wilson: The obvious one is New Teen Titans volume 1, but that doesn't have a ton of Grant. The better option would probably be the New 52 Deathstroke.
  
• Per Degaton: Like Rip Hunter, the Booster Gold (2006) series and 2010 Time Masters are probably the best outlets. Per Degaton is part of a cabal of bad guys in both series.
  
• Jonah Hex: I have not read any Jonah Hex really, but I've heard very good things about Palmiotti's run and, again, there are awesome Showcase Presents volumes. Again, I haven't read any of these so I can't personally recommend them.
  
• Connor Hawke: There was a fairly interesting mini-series featuring Connor. Connor also pops up in the Grant Morrison JLA run. His first story was him alone vs. the Key and it's one of my favorite stories from Morrison's run.

Gail Simone's run on Birds of Prey is probably the best take on Black Canary. She started writing with issue 56 (2003) and wrote through 108 (2007). The seven trades might be challenging to find, though promisingly DC is beginning to reprint it.

Kara kept a journal between Supergirl's first season and its third, and her first comment about Ray is that he "reminds me of Clark in a way I can't really explain." This is a great way for her to figure out why.

Yeah, David Goyer isn't going to stand in the way of Constantine appearing on Legends of Tomorrow.

https://www.amazon.ca/JSA-Omnibus-Vol-Geoff-Johns/dp/140124761X

And if you are like me and you can't wait, binge Legends of Tomorrow, and hit the crossover before the other shows have hit Netflix... You can buy "Crisis on Earth X" standalone episodes on Amazon. They are $2.99 per episode, and there are 4 episodes.

https://www.amazon.com/Crisis-on-Earth-X-Part-2/dp/B077YG4R7C/