This document introduces a handbook for case interviews at QVartz, a Nordic management consulting firm. It recommends that candidates browse all sections of the handbook to familiarize themselves with topics covered. While the content will not be explicitly tested, the handbook aims to serve as inspiration for interview preparation. The handbook is most relevant for candidates new to case interviews undergoing QVartz's recruitment process, which includes case interviews, quantitative tests and group exercises over two days. Strong preparation is advised, as it significantly improves chances of receiving a job offer.