Lucene was my introduction to concepts in document search such as TF-IDF and attribute-based information retrieval working at an eCommerce company where these p

Lucene was my introduction to concepts in document search such as TF-IDF and attribute-based information retrieval working at an eCommerce company where these problems were our bread and butter, but while it was incredibly good at what it did, the concepts it used were so 'low-level' that I always felt like higher level "wrappers" around Lucene such as Solr/ElasticSearch were so much easier to get started with and scaled up (and in many ways, more idiot-proof), even as someone who was not a novice to the field. Lucene in Action was an incredible book though, esp. given the time when it came out, and somehow has remained quite relevant through the years too! Strong recommend!