Shadow Gate. Book Two of Crossroads

Marit was pretty sure she had been murdered. She vividly recalled the assassin's dagger, and her dying vision had shown her the next world - but her spirit had not made the journey. She woke alone, sprawled on a Guardian's altar, with more questions than answers. The Guardians once ruled the Hundred, but disappeared in ages past, leaving reeves to manage the peace in their stead. But Marit finds this peace has been shattered as a desperate army ravages the land, and its leaders walk in shadow, wearing the cloaks of lost Guardians.
As she searches for meanings in a changed world, Marit finds her old love Joss and the Outlander Anji struggling to maintain order amidst chaos. But her own enemies are drawing close. Marit tries to untangle the web of betrayals that connect her murder with the razing of the countryside, but she can't run forever. She will be found and there will be choices: complicity or death.