How many reference books or research books have you re-read.
It is very rare that I will re-read something. It happens. If I read a repair or operator manual and the real life object does not seem to match what I remember reading I may on occasion go back to the reference and try to figure out what year or model is the one displayed. I do not re-read the whole ******* manual to sort out one tiny aspect of it.
The one exception that comes to mind is a wiring diagram. When working on a complicated project with maybe a hundred different colors of wires and maybe a thousand connections I will actually print a copy of the diagram and "read it" many times as I sort out the wiring to make a repair. I recently picked up a VW Bus Westfallia and the previous owner had "Mickey Moused" much of the wiring. I probably went back to that diagram a hundred times during the week long repair.
That is not the same thing as a novel or a reference book where there is a continuity and a narative that is written to follow and make sense.
If a novel or reference book was written in code like a wiring diagram I would probably have to read it many times as I deciphered the code. But that isn't how novels, reference books and bibles are written is it..