If by "modern devops" you mean "they say it's appropriate in a Cloud Native environment" here's some I like or are on my reading list:

  * Seeking SRE

  * Database Reliability Engineering: Designing and Operating Resilient Database Systems

  * The Essential Deming: Leadership Principles from the Father of Quality

  * Infrastructure as Code: Managing Servers in the Cloud

  * Cloud Native Infrastructure

  * the Scuba Paper from Facebook Research

  * Kubernetes in Action

  * Zen and the Art of Motorcycle Maintenance

  * Advanced Programming in the Unix Environment
 
  * Cloud Native: Designing Change-tolerant Software

  * Understanding The Linux Memory Manager <-- kind of old (ie references the coming 64bit memory transitions), but super good

  * Spring Microservices in Action <--- read even if you're not a Java or Spring head, asks questions like, "maybe you should think about service discovery, routing, tracing, etc"