sentences:  A given book may be retrieved in about an hour, not to be loaned out but to be used to verify contents recorded in another medium.Book preservation experts commented he'll have to contend with vermin and about a century's worth of books printed on wood pulp paper that disintegrates over time because of its own acidity.Peter Hanff, acting director of the Bancroft Library, the special collections and rare books archive at the University of California, Berkeley, said that just keeping the books on the west coast of the US will save them from the climate fluctuations that are the norm in other parts of the country.