Actually if you read between the lines, the burning of the books was not that damaging. It was more about controlling information than destroying it. First of all, some books (on medicine, divination, agriculture, and forestry) were exempt from the very beginning. Second, the books to be burnt were those outside of the Qin imperial archives. Given that 1) all the books to be burnt were to be handed to government authorities, and 2) government books were not burnt, it's quite likely that copies of each book worked their way to said archives, and few if any of the books were lost permanently with the burning of the books. Later the Qin archives were burnt, so the books were lost permanently, but that's not the POD here.
There probably were books burned and scholars buried, but we shouldn't look at the Confucian lore that developed around this event and take it as fact.