Denver prosecutors say 34-year-old Thomas Pilaar was sentenced to 10 years in prison and ordered Tuesday to pay $53,549 in restitution. He pleaded guilty in May.
Of an estimated 1,400 books and DVDs that were taken, about 500 have been recovered.
Denver Public Library estimated it had lost $35,000, while Douglas County said it had $11,000 worth of overdue items.
Authorities were tipped off by a woman who recently bought books on Craigslist and noticed the library identification stamps.
