Barnes & Noble is securing its position as the holder of the world’s largest library of digital kids’ content by expanding its collection of NOOK digital picture books and chapter books. The additions include more than 15 interactive Disney Cars and Cars 2 titles along with 50 I Can Read titles.

In total, the bookseller has doubled the number of NOOK Apps after bolstering features on its proprietary NOOK Color reading tablet. Apps such as Fandango, Evernote and Seesmic, along with games including Aces Hearts – a NOOK Color exclusive – and Astraware Tradewinds 2, are among those recently added to the growing collection.

New children’s apps feature popular Hangman, Dr. Seuss and Berenstain Bears characters. Barnes & Noble has also added 35 new narrated Read To Me titles featuring SpongeBob SquarePants, Frog and Toad, Thomas and Friends and others, as well as new Read and Play books featuring activities along with the story for Harry The Dirty Dog, Barbie: Fairy Secrets and others.

Barnes & Noble currently offers more than 475 NOOK Kids digital picture books and more than 12,000 children’s chapter books.