I read chess books the way I learned to read culture theory when I was forced to devour hundreds of texts in a short time.
First reading--fast, get the general ideas, the structure of the argument, the nature of the evidence. For chess books, this step involves reading all the verbal text, looking at some of the key diagrams, and followng some of the variations in your head.
Second reading (many books never get to this stage)--normal reading pace, as one might read a novel. Pay attention to details. For chess books, pause at every diagram. Follow as much of the analysis as possible (at least the main lines).
Third reading (very few books get to this stage)--slow reading. Focus on the details. Critique as you read. Write copious notes in the margins (I use a pencil, never a pen for such marginalia). For chess books, play through the game analysis on a board (or in a database program, although this method is not preferred). Play through the sidelines when necessary (many are short and need only the true
chessboard [the one in your imagination]). Add your own analysis, which you may check with Fritz at a later date.
If this doesn't help, ignore it and write me off as a kook. If it helps, you're welcome.