While now-days people, especially young people(of which I am one) are more oriented towards a instant gratification way of life. Books are after all, beyond cultural vestiges, mostly entartainment and a means to pass the time like movies, sports or games, and in this day and age both informing yourself and beeing entertained are easyer to do, and in shorter time via internet, movies, magazines, games etc rather than sitting for hours reading books.
This is by no means a good thing but it's a rational explanation, and in a shorter version, people today are way to busy and way to lazy to read a book.
Oh, and one more thing, this book was asigned to you and your classmates by your teacher for school purposes, now I don't know what book this or how your school system works but did it ocur to you that said book may suck, or that only you may like it.