In regards to the title of this thread, that has already begun. I never used to be able to find anything to read about the jhanas. Now, there are many how-to books out there, I have a list I am slowly working my way through. There are also specialized retreats to go to, here and there.
In reading the scriptures, there are two kinds of mistakes:
One mistake is to cling to the literal text and miss the inner principles.
The second mistake is to recognize the principles but not apply them to your own mind, so that you waste time and just make them into causes of entanglement.