I have not read SOTE so I don't know if this info would have been in there.
When Leia delivers Chewie to Jabba and threatens him with the thermal detenator, did she know he would react the way he did? Be so amused that Boushh was "fearless and inventive" that he would reward that by being more generous. Did Leia at some point research Jabba/Hutt Gangster culture? Or just through common knowledge. OR......(just thought of this one) did Jabba know it was a scam all along, since Jabba and crew were waiting for her and Han behind the curtain?