Recommended reading for new tech leads?

Hey all, I'm transitioning from a plain old software engineer at my company to tech lead (first in responsibility, then eventually in title)!

I'm very excited about the opportunity, but the role is new, both for my company and personally. Would anyone have recommended reading I could peruse? I'd love to get a solid footing for what I should be doing as a tech lead, and how I can do it well!