Team of Teams by General Stanley McChrystal.

Fundamentally about being agile, adaptable, transparent, collaborative and decentralised. You could say it's about digital transformation but on a military scale. An excellent companion to some other books mentioned here, such as Deep Work (this book is a constructive counterpoint in many ways), Extreme Ownership, and Ego is the Enemy.

https://mcchrystalgroup.com/teamofteams/