The first factor of the advantage of eBooks is convenience. As a result of eBooks offer a level of convenience that allows us to search them easily In addition, Preliminary studies of the way children use eBook devices have suggested that search and dictionary features are useful in establishing and developing literacy but that their utility varies somewhat in relation to the fluency of the reader (Larson,2010): the more fluent the reader, the less need for the dictionary. This reason, eBook can search word easily and comfortable to carry.