Rise of Empire contains Nyphron Rising and The Emerald Storm, books 3 and 4 of Riyria Revelations.  

A puppet is crowned. The true heir remains hidden. A rogue's secret could change everything.

War has come to Melengar. To save her kingdom, Princess Arista runs a desperate gamble when she defies her brother and hires Royce and Hadrian for a dangerous mission. As the power of the Nyphron Empire grows, so does Royce's suspicion that the wizard Esrahaddon is using the thieves as pawns in his own game. To find the truth, he must unravel the secret of Hadrian's past - what he discovers may end their friendship and break Riyria in two.  

A message is intercepted. A sinister plan launched. Two thieves stand in the way.

Ex-mercenary Hadrian Blackwater sets course on a high seas adventure to find the lost Heir of Novron. His only hope lies in confronting the ruthless and cunning Merrick Marius. Fearing his friend is not up to the challenge, Royce Melborn joins his old partner for one last mission. Their journey finds them adrift amid treachery and betrayals forcing Hadrian to face a past he hoped never to see again.  

Performed by Bradley Foster Smith, Chris Genebach, Danny Gavigan, Laura C. Harris, Andy Clemence, Duyen Washington, Alejandro Ruiz, Nora Achrati, Michael Glenn, Carolyn Kashner, David Jourdan, Jonathan Lee Taylor, Andy Brownstein, Colleen Delany, Nick DePinto, Sasha Olinick, Niusha Nawab, Bradley Smith, Matthew Pauli, James Konicek, Scott McCormick, Henry Kramer, Zeke Alton, Matthew Bassett, Jefferson A Russell, Elliot Dash, Michael John Casey, Chris Stinson, David Coyne, Andrew Quilpa, Jacob Yeh, Dylan Lynch, Jeff Allin, Nanette Savard, Mort Shelby, Rose Elizabeth Supan, Richard Rohan, Christopher Graybill, Dani Stoller, James Lewis, and Terence Aselford.