As you can see, embedded links are surrounded by text. Users often miss these links. One Solution to the Embedded Link Problem is to give links their own separate lines within the paragraph. The approach you use should be determined by the nature and importance of the ad hoc links. For non-critical links provided as a point of interest, embedded links can be an elegant, unobtrusive solution.
Moderation is the primary rule of thumb for guiding the creation of embedded ad hoc links.
Used in excess, ad hoc links can add clutter and confusion. When using ad hoc links, it's important to consider whether the linked phrase provides enough context for the user. In Figure 4-9, it's fairly obvious where the Digital Dissertations Pilot Site link will take you. However, if 1861 or 1997 were underlined, you would be hard pressed to guess where those links would lead. In designing navigation systems for the Web, context is king.