You will have to check out ConsultingCase101:
https://www.consultingcase101.com/They have 500+ real case interview questions given by top management & strategy consulting firms like McKinsey, Bain, BCG, Booz, ATKearney, Accenture, IBM GBS, Deloitte Consulting, ZS Associate, Oliver Wyman, LEK Consulting, Monitor Group, Roland Berger, etc. All the 500+ cases are categorized by case type, industry, and consulting firms. They are the best case interview preparation materials without a doubt
Samuel006
Best materials without a doubt are:
1) case interview Secrets by Victor Cheng
2) Case Interview Success, 2nd Edition by Tom Rochtus
3) Case In Point, 7th Edition by Marc Cosentino
Case In Point used to be the killer book some years ago; these days Case Interview Secrets is much more in demand. These books in total have roughly 50 business cases; all available on amazon of course!