This is a rather interesting one. It's possibly one of the most polarising reads in the expanded Whoniverse.
The Bernice New Adventures were already on the cusp of Doctor Who books, good as they were, so when you have a book that is even on the cusp of a Bernice adventure (she's hardly in it), you're stuck in this awkward limbo where you have a book that isn't quite Doctor Who but also isn't quite original fiction.
The story is told through the eyes of the Stratum Seven Agent, allowing us to see the mystery of Dellah's evacuation from an outside perspective and also puts us behind Bernice's own understanding for a change. It's certainly an interesting take and I appreciate Stone revising this as a readily available 99p ebook (just read the name 'Pandora Delbane' as Bernice Summerfield, and 'Samarah' as Dellah, and you'll be fine).
The final act of the book (i.e. the one that actually features Bernice and Jason) is easily the best, while the first two are pretty slow and directionless at the best of times, with a load of bizarre characters just coming and going from the narrative and ending up having little impact on the wider story or being shoe-horned back in for the climax.
Often times, I struggle to see the picture Stone is trying to portray. The scenes are supposed to be all vivid and futuristic but the description is often lacking or contradictory.
I'm also not sure if it's just a problem with the rewritten version, but there are A LOT of spelling mistakes in this book. Most notably, the majority of 'Be' words are turned to 'Me' to the point that multiple sentences on the same page become unreadable.
Overall, this book is told from a unique point of view in the Virgin continuity and it's a refreshing way to see a Bernice adventure, but it takes too long to actually bring familiar characters into the narrative and for the majority of the book you have a pretty plot-less text to get through.