I recently read Mad Kestrel
by Misty Massey (Amazon associates link), which actually hit a lot of the requirements in my post of last week
: relatively unsophisticated protagonist, one viewpoint character, a bit of travel, not in our world. There's a girl dressing as a boy, but not technically disguised
as one. :D
Kestrel is quartermaster on a pirate ship in a world at roughly 17th-century level technology. Her captain is arrested and she sets out to rescue him. Complicating things is the matter of her having a bit of magical talent - she can call up winds (quite useful for a sailor, that) - and in this world all children with magical talent are given over to the Danisoban mages who control all magic, so she needs to keep herself hidden from them.
Massey seems to slightly whitewash the brutality of pirate life, but doesn't flinch from having Kestrel make a particular hard, necessary, decision and follow through with it, which for me makes up for eliding it earlier. The only real false note struck is the trickster character who is meant to be the male romantic interest for Kestrel, who drives me up the wall, so much that I've actually forgotten his name. There's a little too much mysterious attraction happening, and not enough reason
for it other than that he's about the only male who washes nearby.
But recommended anyway.