I recommend The Assassin's Curse. 
 ... this was really fun :D 
 I believe if you want to just read, and you know, want to get entertained, The Assassin's Curse could be good for you. 
 The pirate world was easy to get into, and Ananna's actions were just hilarious to me. I liked that part where she's so oblivious to her feelings. Ananna didn't know she was falling in love, and together with her obsession on owning a pirate ship no matter what... yeah, it was fun. :) 
 Naji was like a robot, but I like him =) He's adorable when he gets confused. Supposedly he was supposed to kill Ananna, but that blasted curse was preventing him. And when the warring emotions becomes apparent on his face, you'd know, he's falling in love with her as well (C'mon, admit it, Naji). Woot! 
 I'm getting carried away here. 
 Anyway, the story was entertaining. It's a fast read, so I did not make myself think much. I just read and read, until I found myself wishing that the pair would just realize the truth about how they feel! 
 There's not a lot of YA with pirate themes, yes? So, I'm guessing starting with The Assassin's Curse is a good move. The adventures of Ananna and Naji are often dangerous, and almost always a riot. =)