Added Data Pipelines with Apache Airflow (#49)

README.md

@@ -158,6 +158,7 @@ Mesos, designed for high performance data processing jobs that require flexibili
 3. [Real Time Analytics: Algorithms and Systems (VLDB 2015)](http://www.vldb.org/pvldb/vol8/p2040-Kejariwal.pdf)
 4. [Grokking Streaming Systems](https://www.manning.com/books/grokking-streaming-systems) by Josh Fischer & Ning Wang
 5. [Streaming Systems: The What, Where, When, and How of Large-Scale Data Processing](https://www.oreilly.com/library/view/streaming-systems/9781491983867/) by Reuven Lax, Slava Chernyak, and Tyler Akidau
+6. [Data Pipelines with Apache Airflow](https://www.manning.com/books/data-pipelines-with-apache-airflow) by Bas P. Harenslak and Julian Rutger de Ruiter
 
 ## License