ElasticSearch Server Second Edition

This is a good book to read if you're getting started with Elasticsearch or considering using it. It goes through all the main areas of getting your data indexed and then searching and analysing it.

It is well written with good examples throughout and helped me get an overview of some of the functions of Elasticseach I'd not yet used. All of the chapters in the book include pointers on where to find further information on the topics covered and for more in depth coverage the authors recommend going on to read their other book "Mastering Elasticsearch".