Thesaurus
As the longevity of reference books goes, the thesaurus is the opposite of the Encyclopedia — the material inside will stay relevant and accurate for as long as the book's around. Bound in leather, this special printing of Merriam-Webster's Collegiate Thesaurus should last longer than most. Individually made by hand in New York, each copy has the word "Thesaurus" embossed into its 100% leather cover, keeping things minimal and to the point.