NetLibrary offers more than 140,000 PDF titles that are compatible with increasingly popular eBook readers, including all four Sony Digital Readers (PRS-300,505,600 and 700BC), as well as the COOL-ER. Soon NetLibrary expects to announce compatibility with even more eBook readers. Additionally, these titles can be downloaded to laptops and PCs for offline reading. An Adobe Content Server (ACS) license is required for downloading, and a one-year license is $350. Libraries can receive a complimentary ACS license with a purchase.