Well, the perfect word for me as a reader is butterfly reader, I can't stay reading a book until I finish it, I read at least three books in the same time, so I jump from one to an other, that makes me feel bored sometimes specially when I don't find the book interesting as much I was expected, honestly, rarely when I do finish a book to the end.
An other way is the random reading so sometimes, I just open the page randomly and I read, of course this method I use when the book is not with chapters, when it's I go directly and read the chapter that I'm interested with
That's in general how I read