As someone who has made a career out of technical leadership, I can't help but warn you: a big part of that job will be management. ;-)
That means most of those management books will be useful to you as well. If you haven't read the classic "The Mythical Man-month" yet: that's a great place to start.
I didn't know "On Writing Well" and it's on my to-read list now. Thanks!
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