Api Security

Manning Publications

API Security in Action                          

Packt Publishing

API Security for White Hat Hackers: Uncover offensive defense strategies and get up to speed with secure API implementation

No Starch Press

Hacking APIs: Breaking Web Application Programming Interfaces

Apress

Advanced API Security: OAuth 2.0 and Beyond      

Independently published

API Security Field Guide (Security Architecture Field Guides)

O'Reilly Media

Web Application Security: Exploitation and Countermeasures for Modern Web Applications

Understanding API Security and Implications (English Edition)

Lulu

API Security                                    

O'Reilly Media

Web Application Security: Exploitation and Countermeasures for Modern Web Applications

skillbyte GmbH

API Security: Mit OAuth 2.0 und OpenID Connect (German Edition)