SOLVED. Juvenile Mystery about a murder at a book publishing party. Suspects were all real authors and each chapter was about their police interview and actually written by them. Think the cover was blue and yellow and featured an elevator. [s]

[Isabel]

I remember reading this and thinking it was a really cool format! I think the premise was that all these authors were under the same publisher and were at this party, and the guy in charge gets murdered? Police arrive and interview suspects one by one, there were some pretty big names on it (could've sworn Anthony Horowitz was in it, but can't find it under his name).

[Becca]

Who Done It?, edited by Jon Scieszka?

[Isabel]

Becca wrote: "Who Done It?, edited by Jon Scieszka?"

Yes, that's it!! No idea where I got the elevator on the cover from, thanks!