In short: Holly Black raises the stakes in Black Heart, the thrilling conclusion to the brilliant and ingenious Curse Workers Trilogy. 
 I was so excited to return to the dark world of curse workers and con men in Black Heart, the third and final book in the Curse Workers Trilogy. White Cat and Red Glove, the previous two books in the trilogy by Holly Black, were fast-paced and terribly clever, with brilliant characters and effortless writing. I was anxious to find out what would happen to our favourite characters in Black Heart and if Holly Black could best herself to come up with the perfect conclusion to an awesome series. I am happy to say I believe she does! 
 I am beyond impressed by the skill and proficiency with which Holly Black writes. Black Heart has three main, separate story lines and problems that Cassel finds himself having to deal with all at once. I am amazed that at such a small number of pages - less than 300! - Black Heart never feels cluttered or rushed. Instead, the multiple plot lines makes Black Heart not only the most intense of the three books in the series, but also makes it near impossible to put down. 
 Cassel is officially one of my most favourite male protagonists of all time. He is the suave and arrogant bad boy on the surface, hiding his true demeanor as a compassionate and often insecure teenager. He faces more pressure and trouble than ever in Black Heart as he is seemingly pulled in multiple different directions with no ideal outcome. And just when you're wondering how is he ever going to get himself out of all these predicaments, Cassel finds a way to cleverly avoid trouble and selflessly give support to those in need. 
 Black Heart is the prefect conclusion to an ingenious and original fantasy trilogy. The ending is left a bit open, but all major story lines are wrapped up nicely. I am a new and vocal fan of Holly Black's after reading this series and I look forward to reading more from her in the future!