Apache Spark Under the Hood Free ebook

Databricks has created an ebook to share excerpts from the book, Spark: The Definitive Guide. 

In this eBook, it cover:

• The past, present, and future of Apache Spark.
• Basic steps to install and run Spark yourself.
• A summary of Spark's core architecture and concepts.
• Spark's powerful language APIs and how you can use them.