If the book is second-hand, I leave all its markings intact, the spoor of previous readers, fellow-travellers who have recorded their passage by means of scribbled comments, a name on the fly-leaf, a bus ticket to mark a certain page. – Alberto Manguel, The Library at Night

Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers. – Charles W. Eliot