Ravens N' Pennies: Book Review: GURPS Power-Ups 8: Limitations
As both a game designer and a gamemaster I found this book immensely useful. It's enshrined in the official cannon rules I've been using for a while now, but it's still quite helpful! What's more it finally calls out something I've always known, but have gotten "looks" for: coming up with a limitation is sometimes more art than science.
Book Review: GURPS Power-Ups 8: Limitations
A quick review of Power-Ups 8 - TL;DR it's good, go buy it. http://www.ravensnpennies.com/2015/03/book-review-gurps-power-ups-8.html#.VQEcz_nF_Cs