I started reading Options math for traders by Scott nations and it gave me very good insights about options and how to use them better including selling puts.

For eg, I really liked how it talked about the breakeven point and regret point in the case of selling cash secured puts. By looking at the breakeven point price, instead of just the strike price, I can now sell at a higher strike than what I have been doing till now, as breakeven point is lower than the strike piece by the amount of premium received.

I easily could have made more premium selling puts on Adobe and Tesla, had I realized this before.

Are there any more good books which you recommend to gain knowledge and deeper insights?