gpparker

Not free, but I've been an AquaMail user on Android for years. IMHO there is nothing better out there.

And for mac OS, there is MailMate (also not free}, which has it's quirks but damn is it good. I gave up on ThunderBird more than ten years ago.

Email clients demand to have dedicated, paid developers.

Mark Kurlinsky's "Paper" covers the early history of printing presses in Europe in great detail. Printers and their presses followed, or instigated, the local paper making industry. There is less focus on the evolution of moveable type there, but I'm also reading "Thinking With Type" by Ellen Lupton which hits the highlights in the history of typeface design.