Not really relevant to discussion of book 1, so while this is picking up a thread from that discussion, I think it better to talk about it separately.
I've just finished an attempt at the mini-adventure in the Mongoose reissue of book 6 for my blog. Most of the previous ones were poorly written, many had careless errors, and the majority just weren't fun to play. This one maintains the standards of those predecessors.
There's nothing wrong with the idea of including bonus material in the reissues to give long-standing fans of the series something extra alongside the slightly revised edition of a book they probably already have. I just wish that more effort had been put into making the mini-adventures any good.
The publishers who've taken over the range since Mongoose lost the rights are continuing the trend of having the mini-adventures. Is it too much to hope that, unlike their predecessors, they might at least have them properly playtested and proofread?
Hopefully they will improve as you go along (perhaps not the poorly written careless errors part, Mongoose is notorious for their inability to proofread anything, see The Maters of Darkness as a primary example), I heard some good things about the latest, like the Dire stories and such. And yes, hopefully Mantikore is better at it.