https://demon-accords.fandom.com/wiki/Demon_Accords_Wiki
A little off-topic but there is another book series I’m into called The Gray Man, it’s really good. The character once was in a restaurant to kill his target and he killed his target with a blowgun while his target was surrounded by a security detail and he went unnoticed by the security detail and the character just kept eating his meal while his target was dying.