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Audio books in the field of various topics; Audio books in the nature of novels; Audio books in the nature of various formats and topics; Digital book readers; Downloadable middleware for software application integration; Downloadable middleware for identifying and authenticating users, presenting content to users, and enabling purchasing transactions; Downloadable children's interactive educational books; Downloadable computer software and firmware for authenticating user identification; Downloadable computer software for authorising access to databases; Downloadable cook books; Downloadable e-books featuring test-taking strategies and practice questions for college entrance exams; Downloadable e-books in the field of various topics; Downloadable educational books featuring various educational topics; Downloadable electronic books in the field of various topics; Downloadable fiction books on a variety of topics; Downloadable fiction e-books on a variety of topics; Downloadable non-fiction books in the field of various topics; Downloadable non-fiction books on a variety of topics; Downloadable non-fiction e-books on a variety of topics; Downloadable series of children's books; Downloadable series of fiction books; Downloadable templates for designing books; Downloadable tutorial e-books in the field of various topics; E-books featuring various topics recorded on computer media; Electronic book reader covers; Electronic book readers; Electronic books featuring various topics recorded on computer media; Electronic publications, namely, various formats featuring various topics recorded on computer media; Fiction e-books on a variety of topics recorded on computer media; Messenger bags especially adapted for holding electronic book readers; Non-fiction audio books on a variety of topics; Non-fiction e-books on a variety of topics recorded on computer media; Series of downloadable non-fiction books in the field of various topics; Tutorial e-books in the field of various topics recorded on computer media