http://www.quantumconsciousness.org/penrose-hameroff/orchOR.html
I hope to read through it a bit later.
In the mean time, I've got a couple of light-weight thoughts on the subject...
It's easy for people who are just starting out on this topic to put their faith in science. Unless they ultimately re-do the experiments and interpret it for themselves then they're simply putting someone else's lessons on a pedestal. I'm not saying ignore everything you read, just be aware how pervasive the act of believing is. Beliefs crop up everywhere.
I've participated in a couple of discussions here regarding the role of science in studying consciousness. IIRC, I figured that there's something called a Demarcation Problem in this area, because although consciousness is a very interesting "something" that we might like to study, empirical science seems ill-equipped because it has the wrong category of tools to do it. In plain English, consciousness is a very personal, experiential, phenomenal "something", that I experience, manipulate, create, do, and make choices with. I also assume that other people have a conceptually similar consciousness of their own, even though its qualities might be entirely different and unimaginable to me.
When we focus on our a priori, 1st-person knowledge of consciousness, we can gain plenty of insights:
-we already know what our own sense of consciousness is like. We don't need other scientists to write their interpretations. In this case we are the scientist.
-we can sense a vast gap between cook-book methodology where we study behaviour, never really knowing if it's some philosophical zombie operating mechanically, versus the metaphysical idea of a telepathic connection between minds.
I've been curious about the idea of Leibniz's Monads lately. Antiquated idea, for sure, but to me it seems it was needlessly abandoned in that dark 19th-20th century era of Materialism and Positivism, and substance prohibition. AFAICT the idea of living atoms was never debunked. Instead, it seems science didn't find it very useful to incorporate metaphysical ideas into newer models. Now it seems we've come full circle: with quantum behaviour being so strange, it could be worth revisiting the idea that 'elements' also have elements of consciousness.