Mckinsey Mind by Ethan Rasiel & Paul Friga

I have been in corporate for around 6 years. Have attended lot of trainings on Problem Solving

And used to think that Business problems are really complicated, and we need tools like Six Sigma to solve it.

But, after reading this book, I came to understand that how easy it is, provided we follow the systematic approach with rigour. Although approach is more of common sense, but systematic and rigour are the key differentiators