You don't need Elasticsearch for most projects. I built a simple search engine from scratch that tokenizes everything, stores it in your existing database, and scores results by relevance. Dead simple to understand and maintain. - Build it yourself

Embeddings are a really neat trick that often come wrapped in a pile of intimidating jargon. If you can make it through that jargon, they unlock powerful and exciting techniques …

*if you include word2vec.

https://jaketae.github.io/study/word2vec/#testing-the-model

The page "Falsehoods Programmers Believe About Names" covers some of the ways names are hard to deal with in programming. This post will ignore most of those complexities, and deal with the problem of matching up loose user input to a database of names.

A description of advanced tips and tricks for effective Internet research of papers/books, with real-world examples.

used book search engines: Google Books/find-more-books.com
it’s worth searching the seller to see if they have their own website, which is potentially much cheaper.