You're right that it doesn't translate literally to cash, but I've been able to cite increased velocity or point to systems I've designed at work with concepts

You're right that it doesn't translate literally to cash, but I've been able to cite increased velocity or point to systems I've designed at work with concepts I learned from similarly process books that allowed me to push for some solid compensation increases and I think the couple hundred dollars in books I purchase a year has allowed me to do that.