Resonance (Echo Trilogy Book 1.5) by Lindsey Fairleigh (epub)[BluA]

Summary:
This ECHO TRILOGY novella takes place between ECHO IN TIME (formerly Echo Prophecy) and TIME ANOMALY (formerly Echo Queen).

**WARNING**
This novella contains major spoilers from the novel, ECHO IN TIME. It's recommended that you read ECHO IN TIME first, though it's not required.
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A week has passed since the confrontation with Set. Lex and Marcus have been biding their time in Florence, waiting for Set to make a move.

Just as they're settling in to their new life together, an act of vandalism on one of Marcus's most prized possessions reveals that their past--and future--is far more complex than they realized.