Three girls--Pam, Bess, and Sue--attend a party to celebrate the publication of the first of the Nancy Drew mystery books. There are many distractions at the fancy affair: flower arrangements, partygoers, refreshments, and lots and lots of marble. Suddenly, the oldest girl, Pam, sees what can only be described as something truly...bilious...not good! Bess sees it too. The youngest, Sue, does not, and as usual she has a hard time getting anyone to tell her anything. Party: A Mystery is a beautifully drawn adventure story that promises questions that will grab children, but does not guarantee an answer.