Below are collected a few potentially useful references for general financial investing.
Disclaimer: Digest all financial advice with several grains of salt, and invest at your own risk. As the ancients wisely stated,
O Fortuna velut luna statu variabilis,
Semper crescis aut decrescis…
O Fortune, like the moon, ever variable,
Always increasing, or decreasing…
(from the medieval poem “O Fortuna“)