I see your point and can endorse it for sure!
It's just that with Coltrane Reference, the chronology half (documenting gigs etc) was much more intriguing to me than the actual discography half of the book. But of course I could learn some from that part, too ... some of the releases are messy (the notorius Fantasy box is the worst), and some of the chopped up late session were interesting to read up, too.
The bad thing is just that any printed discography will be outdated as soon as it's fixed on paper ... I guess it would be cool to put the entire discography online somewhere. If they don't want to give it away for free, put a coupon into the book or something like that ...
But regardless, it's a huge achievment (and I will buy a second edition, too, call me crazy! I went for the first a year or so ago, when the paperback was still unsure).
So you're doing a Tjader book? A discography? Anyway, that's cool!
And if the Gryce book really comes out again, I won't miss it this time!