Murder at the Library of Congress — Margaret Truman

In the depths of the U.S. Library of Congress toil thousands of researchers, chasing down obsessions, breakthroughs, and new contributions to human intelligence. But when amateur D.C. sleuth Annabel Reed-Smith enters this stately American institution, she discovers a hornet's nest of intrigue and murder.

After a renowned scholar is bludgeoned to death among the scholarly stacks, an ambitious TV reporter links the case to the heist of a Spanish painting from a Miami museum and a killing in Mexico City. Annabel suspects that buried in the library are secrets some people will do anything to keep silent--the secret of a rich man's ambition, a researcher's disappearance, and a mysterious diary of Christopher Columbus's journey written five hundred years ago....