This was a quick, easy read — I finished it in one sitting.
Echo 8 is a blend of science fiction and romance that manages to treat both genres with respect. In other words, it works as both a science fiction novel and as a romance novel. The scifi is exciting and plausible enough to suspend disbelief for, and the romance is engaging without taking over the story.
I particularly enjoyed the worldbuilding element — the idea that a disaster caused some people from one dimension to transfer into another closely related dimension where they live as energy parasites — needing to feed in order to survive. The world continued to develop throughout the book in intriguing ways.
The characters were fairly well done, although limited time was spent on developing them. I usually don’t like love triangles, but this one managed to work for me, in part because it was always obvious which one Tess would choose.
My one complaint about this book is hard to describe … it’s a sense that there could have been more. The book was fast-paced, yes, but at times I would almost say rushed. I would have liked to see a more gradual progression of the major plots, more time spent on character development, and more time spent on the resolution (which came about too easily for my taste).
I do recommend this book to readers who love both scifi and romance.