I once borrowed a technical book from my school library, and the previous owner who donated that book in the 90s circled the phrase "proof is left to the readers" commonly found grad math book and wrote a big "W.T.F?". It made me laugh so much hha
replyYou might appreciate this one :) https://allpoetry.com/Marginalia
replyTANGENT One of my all-time favorite websites:
replyhttps://www.themarginalian.org/
Highest possible recommendation for its thoughtful, intelligent, entirely human, poetic writing about various interconnected topics. Maria Popova is a treasure.
Nothing quite the same as making scientific conjectures in your marginalia or jotting down ideas in books and then having strangers find them and reinterpret them their own way.
replyThese were fun to find in college bookstores every semester. Not a fan of "highlight it all" but the occasional enlightened soul with a scientific bent.