The Crimes of Grindewald is part of the Harry Potter Universe books!
 
Grindewald is a ring wallet set in gold, black and green and comes with three safety accessories, and the standard pom pom:
Personal Alarm with LED light
Kitty Knuckles
Kubotan Stick
Additional add-ons such as seat belt cutter, whistle, hand sanitizer holders and chapstick holders are available online under 'Accessories'.