While ABC's Castle continues to garner an increasing amount of interest for its sixth season, it's the creative works of Castle (Nathan Fillion) that have made the most recent of chatter.

Carter Matt reported that although "it is impossible to have an actual Richard Castle novel (given that the man is a fictional character, tragically), you can at least pick up one of many Castle-inspired and official-sanctioned Nikki Heat novels."

Just six days prior to the program's return for its upcoming installment, the ABC network is going to release Frozen Heat, the newest in a series of hard-covered novels that has sold over two million copies around the world.

The entertainment site put out the following synopsis on :

"For the search, Nikki once again teams up with her ruggedly-handsome romantic partner, Pulitzer Prize-winning investigative journalism Jameson Rook. Their quest for the truth about Nikki's mother's murder takes a suprising turn when the duo unearth an alarming terror plot - which is anything but ancient history. It is lethal. It is now. And it has already entered its countdown phase."

Actress Stana Katic dishes more on Castle's marriage proposal to Beckett

Castle is set to return for season 6 on Monday, September 23. Keep checking back for more of the latest details on the ABC series. A fan-made trailer of the upcoming season can be watched below.

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Castle, ABC, Television