On Lucene in Action -- mini review

On Lucene in action is a great book for anyone who has to solve practical problems with Lucene or its related family of products. For me, someone who is working on a fairly complex Solr install the book is a gem because:

1. The authors have made a decent attempt to address the issues raised by the community of users -- It's amazing that the book yields rigorous answers faster than does google -- in the post Google era I find that impressive. 
2. The book is more a crystal ball than ink on paper -- I seem to run into solutions to my most pressing problems as I read through it.

I think for any serious user of Lucene based products,the following chapters should be required reading.

• Chapter "1" -- Meet Lucene where it introduces the Lucene.
• Chapter "2" -- Indexing which deals with the architecture of the Indexing system and important peripheral issues such as performance, configuration, etc.
• Chapter "3" -- Where contains a excellent discussion on the scoring system Lucene uses.
• Appendix C -- which deals with the Lucene index format.