Ask HN: Best resources to learn about Search and Information retrieval

At work I operate a search platform, which led me to learn about search engines in general and how they works.

The deeper I dive in the rabbit hole of information retrieval technologies, the wider it seems to me.

I want to proactively learn about it, which I plan to do with the following books:

- Relevant Search

- AI-Powered Search

Should these be enough to acquire a deep understanding of the domain ?

Do you have alternative or additional resources to suggest ?

Thanks!