Rovelli’s “Quantum Gravity” arrived today (well, yesterday actually), sooner than i expected. And, albeit my plans were to finish Penrose (see reviews, specially this one) before starting this one, i’ve just read the first chapter and am hooked. This first chapter is an overview of Loop Quantum Gravity, a roadmap of what’s in store in the rest of the book. Basically, it’s an extended version of the essay i mentioned in my previous post, and is, i think, quite readable by non-specialists. The good news is that a draft version of the book is available online, so you don’t need to spend money to read it. I’ll try to keep (the two of) you posted on my readings.
Skimming the first chapter’s bibliography, i’ve remembered a couple of ‘popular-science’ books on QG i own: “Three Roads to Quantum Gravity” (Lee Smolin) and “Physics Meets Philosophy at the Planck Scale: Contemporary Theories in Quantum Gravity”. I read them 3 or 4 years ago, and they may be a good companion while commuting to work, and an alternative for those of you with a moderate interest in these matters.
If you have a bit of mathematical background, this introductory article is also a good way to get acquainted with the basics of LQG and one of its central results, the quantization of space. Have fun!