1. One or more computer-storage media having computer-executable instructions embodied thereon that, when executed by a computing device, perform a method for providing contextual advertisements presented to a user in association with electronic books, the method comprising: receiving information to be included in a contextual advertisement for presentation to the user; identifying an electronic book including a plurality of pages; identifying content associated with each one of the plurality of pages; receiving a user profile associated with the user; comparing the information to be included in the contextual advertisement with content of a target page of the plurality of pages, the user profile, and content of one or more pages preceding the target page to determine whether the information to be included in the contextual advertisement corresponds with the content of the target page, the user profile, and the content of one or more pages preceding the target page; and based on determining that the information to be included in the contextual advertisement corresponds with the content of the target page, the user profile, and the content of one or more pages preceding the target page, presenting the contextual advertisement to the user.
7. The computer-storage media of claim 1 , further comprising: generating the contextual advertisement based on one or more sequels to the electronic book.