I find it interesting that you have a background in molecular biology and that you still find it handy as an author. My question is, what Black Library publications of yours demanded the most revision in that science? I've a similar background, but not to the level of PhD. I'd be interested in reading your description of alien creatures or mutated monstrosities.

David Guymer Hi Jack, I love science questions. I've been writing full time for 4 or 5 years now and I live in fear that I'm slowly forgetting everything. When I first started writing 40K (as opposed to fantasy) with Echoes of the Long War I was actually asked to take a lot of the science out, on the basis that in the 41st Millenium this is actually unknown magic. For that reason I don't really revise the science as such. But I do think it gives me the basic grounding to write gribbly xenos or monstrously OTT Iron Hands with confidence.

My favourite use of it was probably the massive PCR machines in Echoes of the Long War

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