Companies Act you can download for free. It consists of several chapters, see which are the ones you are interested.
The books otherwise are academic heavy. My opinion, when you have confusion google it or use a forum.
Banking agreements, commercial lending are governed by multiple acts. I don’t want to confuse you, but unfortunately our regulations are like that.
Being an investor that would be too much I think, for some of us it came with education. But I can tell you they are not much helpful while investing….it only refines the language we speak.
You may put your heart and soul out in understanding the business you like, financials you will close the gaps as you progress.
If you want to dig dip in business, I can suggest few my of favourite books.