Looking for all the information I need to build a waveguide for my speaker project

I'm looking for books, websites, guides, just all the information I need in one place to add a waveguide to my speaker. From the design perspective to the attachments (where does it have to be placed and how do I best adapt it to my design) to the functionality. The topic is relatively new to me and I need reading material otherwise I won't get any further.

I haven't found that many "ready-to-use solutions" on the internet, so I guess I can't avoid designing one myself.