7.1 Required reading
Hull, John, Options, Futures, and Other Derivatives, (8th edition or later), Prentice Hall.
The price of the book depends on the edition and the seller. It is not obligatory to have the latest version, any version from 8 onwards will do.
7.2 Optional reading
The following study material can be studied voluntarily :
Sundaram, R.K ans S.R. Das, Derivatives. Principles and Practice, Second Edition, 2016, McGraw Hill