Books on options trading generally come in two varieties. First, there are the bloodless, esoteric academic treatises that reach truly substantive and innovative conclusions, but never bother translating that quantitative research into strategies that are useful for the individual options trader.
You might say that the three key components of any options trade are time, price and volatility. That is to say: the time left until those options expire, the price of the underlying, and the volatility implied in the options prices. It’s easy to forget that last component, and sometimes people don’t take implied volatility into consideration when opening trades.