I'm certainly not the first author to tiptoe into the conspiratorial, religious-tinged territory, but - and I hate to break this to the faithful - neither is Dan Brown.
We have long suspected that the faceless organisations that run our world - be it the church, multinational conglomerates or the government - keep things from us.
'The Searcher,' as the title suggests, is about someone in search of something, and I have always loved quest stories and so was drawn to writing one myself.
The author always knows more than the reader does at the start of a novel, and gradually, they share that knowledge with the reader - that's storytelling.
'Solomon Creed' is a man who knows everything about everything but nothing about himself and is on a journey of redemption to try and reclaim his identity.
'Sanctus' was done on speculation. I had no agent or publisher. I was being sensible, I suppose, by writing a standalone novel. I figured if that one didn't work, no one would be interested in reading a sequel.
'Sanctus' deals with creation myths in every culture. It fascinates me that all cultures, evolving independently, have similar models of mankind's origins, of a Greater Being, of the flood, and so on. It's amazing how they crop up time and time again.
Quest stories are about the oldest form of narrative there is, and they're also the perfect metaphor for life because we're all on a journey trying to figure out where we're going and who we are. 'Solomon Creed' is just doing it with more danger and guns involved.
One of the things that made me try writing novels was I could take time off to be with the kids. That's the practical side of what I love about the writing life.
My family and I live in a wing of a Georgian mansion in East Sussex, which was built in the 1780s and fell into disrepair. It was rescued in the Seventies and carved into six terrace houses.
It's interesting to note that when something like a virus tries to poison us, the first thing our bodies do is heat up. We burn away the infection. Maybe that's what Earth is doing to us.
It is easy to be inspired by history when you're living in a part of it and allow that to seep into your writing: having said that, a minimalist room with no distractions is often better; the most exciting visions should already be in your head.
If, after five years, I hadn't had anything published, I was just going to forget it and go back to TV full-time until I retired or they put me out to pasture.
If you look back to the earliest religions, before they got organized and started building churches and amassing wealth, they all sprang from the same place - they were inspired by nature.
If you look at the great Westerns, and at Greek, Roman, and Norse mythology, they all contain elements in common: a harsh landscape; demons or outlaws trying to stop or kill the protagonist; and there are mythical legends at their core, innate in all cultures.
If you do come across 'Sanctus' in a bookshop, please see past the cross on the cover and the sinister outline of a monk and just read the first page and make your own mind up. If it's still not for you, then that's fine; just put it back and walk away.
I think 'The Searcher' is a departure from my first because it's less grounded in religion and is far more rooted in the mythic tradition: more of an existential thriller where the main character is actually the central mystery, and his journey is all about trying to figure himself out.
I looked back at the years since I'd left college and thought of the list of things I'd have liked to do. I'd always wanted to write a book - not a small undertaking. I never felt I had the time or creative energy to spare in order to write one as well as I wanted.
I figured if I write a modern thriller but spliced in the DNA of a classic western - the drifter who comes into town with secrets - I could do something interesting with both genres. Westerns are also an incarnation of the classic knight errant tale, the lone warrior with a moral code, and I love those types of stories.
