There are 5 books in the The Ascendance series. The newest book is The Shattered Castle which came out in 2021.

1
The False Prince

Book cover of The False Prince
If you love the danger and sword-fighting of MERLIN, you'll like this! In a discontent kingdom, civil war is brewing. To unify the divided people, Conner, a nobleman of the court, devises a cunning plan to find an impersonator of the king's long-lost son and install him as a puppet…
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2
The Runaway King

Book cover of The Runaway King
The thrilling sequel to THE FALSE PRINCE (9781407133058). GAMES OF THRONES for a younger audience. If you like the danger and sword-fighting of MERLIN, you'll love this! Jaron is now in his rightful place as king, but he knows that with traitors in his castle, and enemies at the borders,…

3
The Shadow Throne

Book cover of The Shadow Throne
Jennifer A. Nielsen takes readers on an extraordinary journey in this final installment of the NEW YORK TIMES bestselling Ascendance Trilogy. War is coming...Join Jaron as he embarks on his final adventure!

4
The Captive Kingdom

Book cover of The Captive Kingdom
Acclaimed author Jennifer A. Nielsen marks a return to the world of her beloved New York Times bestseller The False Prince in this highly anticipated fourth book of the Ascendance Series!

In a peaceful Carthya, Jaron leads as the Ascendant King with Imogen beside him -- but the peace he…

5
The Shattered Castle

Book cover of The Shattered Castle
Acclaimed author Jennifer A. Nielsen brings her signature twists and high-stakes action to the fifth installment of the New York Times bestselling Ascendance Series!

King Jaron has outwitted the Prozarians and returned to his own kingdom with one secret in his pocket that not even his friends know about. He's…