Investments and Portfolio Management (Bodie, Kane, and Marcus)

Equity Asset Valuation (Jerald E. Pinto, et al.)

Basic Econometrics (D. N. Gujarati) or Introductory Econometrics for Finance (Chris Brook)

Options, Futures and Other Derivatives (John Hull)

Fixed Income Analysis (Frank J. Fabozzi)

The Intelligent Investor (Benjamin Graham)

these are extensively used investment textbooks in both under- and post grad level krub