Most good developer books are like math books, you can't just read them you have to put the material you to practice to fully comprehend it.
If you are going through developer books like novels you might be more of a software project manager type who needs to know all the jargon without truly understanding the meaning behind it.
As a point of clarification, owning and reading a lot of books does not make you a librarian any more than typing a lot of formulae into an excel spreadsheet makes you a software developer.
Trust me, as of tomorrow I've been married to one for twenty years (a librarian that is, not an excel spreadsheet.)