Thicker Than Blood
The world's greatest assassin returns in Thicker Than Blood, where the conspiracy that has captivated readers finally reaches its jaw-dropping conclusion.
Adrian Hell is still struggling to adjust to his life in The Order of Sabbah. His next target is the last person he ever wanted in his crosshairs - a final reprimand for his previous defiance.
But as the true motives of the shadowy organization become clear, he realizes his toughest choice is really no choice at all.
He stands against the full might of The Order, relentlessly pursued by the best killers in the world, desperate to put an end to them before they change the course of history forever.
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James P. Sumner
James P. Sumner began writing in the summer of 2013, finally feeling ready to pursue a lifelong dream of becoming a published author. He worked tirelessly to learn the business as well as the craft, and eventually self-published his debut novel, True Conviction, in February 2014. It was very well received, which spurred him on to continue his Adrian Hell series, which has now been downloaded over half a million times, with each entry topping the Amazon charts.
His Adrian Hell character has become a popular figure in the thriller genre, mainly due to Sumner’s style of writing, which puts the reader inside the head of the charismatic assassin, so they experience his thoughts and see what he sees in real time — something you rarely see in mainstream thriller fiction.
In 2015, his fifth novel, A Necessary Kill, was selected as the winner of Amazon’s Kindle Scout program, and was subsequently published by Kindle Press. It quickly became his most successful novel, and was briefly the most downloaded e-book in the world. This changed his life and his career as an author, allowing him to make the switch from part-time to full-time. Then, in 2017, Sumner was the recipient of two ATAI awards for his seventh Adrian Hell novel, Thicker Than Blood, which picked up the Best Thriller and Best General Fiction accolades.
Adrian Hell Series
Adrian Hell Series consists of ten primary books, and includes two additional books that complement the series but are not considered mandatory reads. The current recommended reading order for the series is provided below.

