Definitely not the most engaging book in the DC Icons lineup. Sarah J Maas' writing style is very hot and cold with me, as I wasn't a big fan of A Throne of Glass and only have a passing interest in her Court series. The girl gang aspect was really fun and it was neat to see a team up between Catwoman, Poison Ivy, and Harley Quinn, but it was probably the only enjoyment I got out of the book.

Luke had the potential to be an interesting adversary to Selina if he wasn't so inept and dull. The majority of the book is her constantly one upping him at every turn, making him look like the most incompetent member of the Bat family. I applaud Maas for trying to bring some notoriety to a lesser known character, but making him lose at every turn just to show how amazing Selina is really does him a disservice. 

As for the twist, eh. Could take it or leave it.