Books

Akka/Akka.NET

Reactive Web Applications (Manuel Bernhardt, June 2016)
Akka in action (Raymond Roestenburg, Rob Bakker, and Rob Williams, September 2016)
Reactive Applications with Akka.NET (Anthony Brown, September 2018)

Reactive Messaging Patterns with the Actor Model (Vaughn Vernon, July 2015)
Functional Reactive Programming (Stephen Blackheath and Anthony Jones, July 2016)
Functional and Reactive Domain Modeling (Debasish Ghosh, October 2016)
Reactive Design Patterns (Roland Kuhn with Brian Hanafee and Jamie Allen, February 2017)
Rx.NET in Action (Tamir Dresher, April 2017)
Reactive Application Development (Duncan K. DeVore, Sean Walsh, and Brian Hanafee, May 2018)