Confused by a couple things. More than half of the available upgrades require "Amber", a resource I have not seen after hours of play. The current "Gather Space" says it requires 20.0K Space, and I have 30.9K but I cannot purchase "Gather Space".
I missed it because I depended on the spellbook. It shows undiscovered combinations of the symbols as "????" but did not show C-A-N. I'll have to get pen and paper and double-check.
