A book is a very special thing, before books, when a person died they took their knowledge with them. Until books we had no way of passing on information except through what we could teach others, and no matter how good our students where, we could never pass on everything we knew.
Today we can treat cancer, we have the internet, aircraft, and all kinds of other technological wonders. A few centuries ago we did not have any of these things, but it is not because people back then where less intelligent, the human brain is practically identical to how it was thousands of years ago. We only live in such a technologically advanced era because we are able to stand on the shoulders of those who went before us. Books are one of the few differences between us and cavemen.
In my opinion, burning books is treason against humanity, and a way of advertising your ignorance and hateful nature. A book is much more than a collection of words, it is a window in to the minds of our predecessors, and a way of sharing and experiencing first hand their thoughts. With this in mind.
Would I burn a book to save my own life? Sure. We live in a world that has the internet and the printing press, the book can be replaced and does not have more value than my life. However, if the internet where destroyed, and humanity on the verge of extinction, say in some kind of ice age, and I had the last book on earth then I would not burn it, even at the cost of my own life. Even if it where a bad book, a poorly written book, even if it where a copy of mein kampf, the idea of books is so valuable that no ones life would justify its destruction.
Books are such powerful tools, that thanks to them i now live in a world where i can even afford to throw them out or burn them.
Lets face it, there is nothing wrong with letting a novel or two be destroyed. or even using them as kindling. but to destroy books with the intention of supressing the thoughts within is just barbaric.