When it comes to reading, there are literally thousands of methods from Speed Reading to SQ3R to Sequential(Word by Word till the end). My question is regarding reading mathematically/theoretically dense books as a graduate student. My question is primarily targeted to Science, Technology, Engineering, and Math (STEM) fields.
I have read the other question on SE and this is designed to act as a question on similar lines but for books (> 400 pages) typically found on Reading Lists for Quals. I believe how one reads a book differs significantly from how one reads a paper. (This could be a question as well but IMO, the length, intention and structure are sufficient to cause the difference)
In order to make this an objective question rather than a vague and open ended one, I wish to concentrate on the following:
Should a book be read from start to finish word by word or through iterations (Skim, Analyse, Summarize)?
If I am interested in a particular chapter with a lot of dependencies, is it in my interest to read everything till that chapter or read that chapter > google unknown terms > read chapter again and loop?
If one gets stuck for over a certain threshold at something is it wise to continue assuming it as true or to persevere till the end and figure it out. This is true for research papers, is it true for books?
How much time per (mathematically dense) page is ideal? This will vary a lot with field but not so much with person as it would with fiction (IMO).