Not all books are worth your time to complete. Not all books are textbooks that you read end to end. Not all books are meant to be read in one sitting. Not all books need to be understood in their entirety to be useful. Not all books reveal their value in the first few chapters.
Read with purpose, not obligation. If a book isn’t serving you, move on. Skim, skip, or revisit later - your time is valuable, and not every page is worth it.