The first volume, “API Design” teaches you the basics of designing APIs for your business or startup.

tl;dr: The second volume, “API Security” teaches you about the most critical security risks in APIs and how to avoid them. It also covers topics like authentication & authorization as well as securing webhooks with OAuth 2.0.

tl;dr: The third volume, “APIs Management”, shows how to run an API program within your company or startup by defining roles & responsibilities for different stakeholders involved in managing an API program (e.g., developers, product managers)
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