The first tome has been recovered but Will found out that he was not compatible with it. Simply finding the tomes won't be enough, he'll have to find the people who can make use of them.
Except everything is far more complicated than this. It seems as though the tomes are the pattern from which the Dyvari learned to make their system of control. The implicatins of that may have long lasting effects. Beyond that, Will has discovered that what he knew about magic is only part of the picture.
Chaos and order seem to both play a part. Will and Catherine are going to have to adapt if they want to free humanity but the question is whether they can survive the changes that come with it.