A Goodreads user
A Goodreads user asked Genevieve Cogman:

Will the Lost Plot show more of Kai and Irene's relationship? The first Invisible Library kind of developed the relationship, the Masked City established it more solid, but Kai wasn't in the Burning Page and Masked City as much. Not that I am complaining! I adore your books!! Anyway, my questions remains >.< AND WHAT ABOUT VALE AND IRENE?! WILL THAT BE ADDRESSED?!

Genevieve Cogman I can promise that Kai gets plenty of screen time in The Lost Plot, though I can't tell you exactly what happens... As for Vale, he gets more screen time in book five.

And as for the future, well, I can't tell you. The invisible ninjas would do something horrible to me. You know how it is.

Though I'm very glad you enjoy the books. :)

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