Is there a text on Apache Spark that attempts to be as comprehensive as White's Hadoop: The Definitive Guide'?
Learning Spark: Lightning Fast Big Data Analytics is a fairly comprehensive book covering the core concepts as well as the higher level components involved in the Spark stack. This is the book recommended by Databricks for their Spark Developer Certification as well.

If you are interested more about the use cases built using Spark, I suggest Advanced Analytics with Spark