Re: What Fantasy/Sci-Fi book have you just finished? Please rate it...
Mistborn by Brandon Sanderson. A solid, unconventional, medium-weight fantasy novel that revolves around an unusual magic system.* First of a trilogy, but a standalone book in its own right. The ending comes surprisingly quickly. I get the impression that Sanderson is of the damn-the-torpedoes school of writing, as opposed to the outline-everything-first technique. But here, at least, the resulting story is pretty tight, with most major loose ends sewn up (the others presumably being left for the sequels). Characterization is pretty good, at least for a limited number of main characters. Definitely recommended; looking forward to the next two books (which are already out).
*Based on the ingestion and use of metals as fuel for different magical abilities. This is one magic system that should be pretty easy to model in Hero, especially with its limited range of powers, so far anyway.