For explorers of eurorack and modular synthesis there are two excellent resources you really should check out:
1. These video courses by synth and modular expert, DivKid: https://ask.audio/academy?nleloc=profile/benwilson
2. The new book from the makers of Push Turn Move, Patch & Tweak (which met its Kickstarter goal within 10 minutes!)
We met up with co-author of Patch & Tweak in Elevator Sound, Bristol a few days back. It's not only awesome to meet up and chat with Kim, he also gave us a very interesting interview describing the thought behind and the making of Patch & Tweak, as well as the novel patch system in the book which they're hoping can be used more widely in the modular community, no matter what brand of modules are being utilised.
And it's not just synth-heads that enjoy Patch & Tweak...
More about Patch & Tweak (£55): https://www.kickstarter.com/projects/1795693416/patch-and-tweak-exploring-modular-synthesis
More about modular synthesis: https://ask.audio/academy?nleloc=category/audio/topic/synthesis