After the exhilirating joyride which was 'Time's Eye', I can't help but state how disenchanted, disappointed, and saddened I was by the near-tripe that is Sunstorm.
I'll attempt to do so with minimal/no spoilers.
First, there's the obvious: Bisesa is nearly non-existant. While this itself is acceptable, her minimal presence is, at best, distracting; at worst: disappointing. Where is the headstrong lady from the first book? Where is the go-getter? Heck, where is the presence of mind to weep for your lost love, grab your daughter, and do something. Instead....
Second, there's the more obvious: the book, unlike it's predecessor, piles on the science at the cost of the fiction. While this is fantastic in the sense of addressing a major (for sci-fi) shortcoming of the first book, it cost it's enjoyability. Within the first few pages, we (the readers) are aware of the situation and 'the cause'. We don't need 200+ more pages describing it, and the solution. Along those lines, at the cost of the (occassionally nauseating while pleasantly liberating) PC vestiges of the book: "increase the humanity". Make me, the reader, *care* for Siobhan. Or Bud. Or Eugene. Anybody.
Well, I take that back: Athena was a *worthy* addition. I empathized with her. I would have like to have more time spent on her. Of course, 'her' portion was itself limited. To the degree that became, itself discouraging, but, at the least, in line with the rest of the novel.
Finally, the resolution was... anything but. Minimal details on the First Born emerged, and the post-storm section was glossed over.
Hopefully, being the optimist, Clarke and Baxter will revisit the world a third time. Hopefully, if so, it will be the charm.