Even if I own physical copy of this book, I would like to see it being part of the GoG bonus package. We have both official guide books for Wiz 6 and 7, so I dont understand why there is none for 8.

It's only speculation on my part, but I believe it is because the clue books for VI & VII are in-house publications and the guide for Wizardry 8 was published by Sybex. It goes to reason that they would have to license Sybex (and possibly the author) to include it here. If it's any consolation, the guide only has a 2.7 star rating on Amazon.

Yes, guide is full of mistakes and doesn't really offer anything that couldn't be find on fansites, but still it would be nice to have digital copy. At least for me, as big Wizardry fan.