When last we saw the book of fate, it was being guarded by the Winter Knight, from King Arthur's Camelot, and taken into his order the Knights Templar. The book would remain there until the Knights Templar started to dissolve.
Toby, a lawyer in the Youngblood murder trial, would explain what happened next.
It's kind of surprising that Moore didn't show any adventures of the pirate Captain Compass, but I guess he may have thought his pirate comic in Watchmen was enough.
NightEagle, the Native American magus, testifies in the Youngblood murder trial about the Puritan who would obtain it next. It's clear that Deliverance Drue is based on Solomon Kane.