I mean this is decent advice, but slightly odd given you could easily have plugged your site here AND actually given the OP what they asked for :-)
Maybe it’s some reverse psychology thing. Ok I’ll do it, you evil genius…
PS CTOs aren’t always chosen, many are self-appointed as founders or co-founders (possibly in this case too).
Chosen implies you’ve been subject to external assessment, self-appointed is a different matter altogether (ie. you may be extremely aware of possible knowledge/experience gaps that you need to quickly fill).
To add my own suggestion, I think High Output Management by Andy Grove is an excellent resource (not just for CTOs)