Not bad. I really liked Zarek and rooted for him in Night Embrace, but I expected better from his book. 
 First, the novel could have been shorter: the heroes had each thought and feeling detailed in excruciating details, witch at one point got rather repetitive and tedious. The subplots were numerous, with characters I didn't care for, and they sometimes overshadowed the main story. 
 The fact that Zarek knew absolutely no decent human being in more than 2000 years was far fetched, as was Astrid's way to judge him. (Being and doing everything he hates and see if he looses his temper... ahem... wtf ?) 
 But the worst of all was Simi. 
 Simi wins hands down the award of the most annoying side-kick ever. I hated all the scenes including her, and they seemed to go on forever... 
 As a result, I would have preferred a great short story rather that an average novel. 
 Still, I liked it. 
 How can't you like it when the H/h common ground is the love for St Exupery's Little Prince ? 
 Talk about kindred spirits ;)