If you just want to get up to speed on the mathematics, Luenberger's Investment Science is a classic. https://www.amazon.com/Investment-Science-David-G-Luenber

If you just want to get up to speed on the mathematics, Luenberger's Investment Science is a classic. https://www.amazon.com/Investment-Science-David-G-Luenberger/dp/0199740089/ https://www.amazon.com/Investment-Science-David-G-Luenberger...