This has been on my mind to suggest for several months, and since it just came up in another thread, now seems like a good time to do it:
Jaubert, Annie: The Date of the Last Supper. Staten Island, NY: Alba House, 1965.
I've had it recommended. It's supposed to be a classic. As I understand it she argues that Jesus celebrated Passover on Tuesday evening according to the old calendar, and died at the time the Passover lambs were being slaughtered on Friday according to the new calendar. Solves both the Synoptic-Johannine discrepancies and the shortage of time for all those trials.