I suspect that to his (and his publishers' minds) the collapse itself is the finale, and the trial is a marketing campaign. The more press the trial gets, the more people are going to get curious to learn about the background and judge for themselves, and just in time a book about the company/SBF by an author who is notable for his ability to explain and humanize complicated business concepts to a general audience is right there on the front shelf at Barnes and Noble.

If anything, when the trial is over they re-release with an epilogue evaluating the trial.

There'll be a revised edition. I suspect Lewis was in court partly to gather first-hand impressions for the new chapters on the trial.

There were at least 2 other books in the making, all by authors interested in SBF. There was no time to wait if one wanted to be first to market.

Yes exactly! If he's going to pure entertainment value ... I mean this article itself is case in point.

It would probably be more than a chapter of material too.