I found a nice rocketry booklet from Estes from 1964 in an antique store in Martinez, CA several years ago. I scanned it and uploaded it: https://archive.org/details/model-rocketry-booklet/mode/2up

Pretty cool, I think. You can pull down the PDF if you like.

Covers the physics of model rocketry, shows you how to build a wind tunnel, talks about recovery, lifting capabilities, rocket-powered gliders, multi-staging, clustering, determining altitude.... (Stereotype humor on 2nd to last page depicting a Chinese man - near Peiping - holding an American model rocket.)

I loved estes model rockets as a kid. I remember they had a model for "rich folks" that could launch an egg inside. Really rich folks could get the one with the 8mm camera.

I was poor and could only launch a few times. My go-to rocket was a "park toy rocket" I could fill with water, pump up manually, and launch over and over.

I remember having fun with them, but also having less luck than I would have liked with building them (though it improved after I started letting the glue fully dry before launching). Launching without a nosecone after a failed recovery was instructional, too.