is Bitterblue the very last book?

will there be any more books now that *SPOILER ALERT* they've discovered Pikkia and Dells, planning to take Thigpen down from the throne and are now exploring the east (of Pikkia and Dells)?
plus, Randa is still king in Middluns. personally, i don't think this is over until he's overthrown.

at the same time it was a practically good ending to decide for yourself how things will turn out.