I am the author of Magicians of the Gods, published on 10 September 2015, and of the major international bestsellers The Sign and the Seal, Fingerprints of the Gods, Heaven's Mirror, Underworld, and Supernatural.

I share below the story of the journey that led me to these books

In the early 1980's, when I was East Africa correspondent of The Economist, writing about wars, politics, economics and aid programmes, I had no idea where fate was going to lead me or what strange seas of thought I would find myself sailing on. But in 1983 I made my first visit to Axum in northern Ethiopia, then in the midst of a war zone, and found myself in the presence of an ancient monk outside a little chapel in the grounds of the cathedral of Saint Mary of Zion. The monk told me that the chapel was the sanctuary of the Ark of the Covenant and that he was the guardian of the Ark, the most sacred relic of the Bible, supposedly lost since Old Testament times. What he said seemed ludicrous but for some reason it intrigued me. I began to look into the Ethiopian claim and found much surprising and neglected evidence that supported it, not least the faint traces of a mission to Ethiopia undertaken by the Knights Templar in the twelfth century. I kept adding to that dossier of evidence while also continuing to pursue my current affairs interests (including Lords of Poverty, my controversial book about foreign aid, published in 1989), and finally, in 1992, I published The Sign and the Seal: A Quest for the Lost Ark of the Covenant, my first full-fledged investigation of a historical mystery.

As well as to Ethiopia and to Israel, my research for The Sign and the Seal had taken me to Egypt and opened my eyes to the incredible enigma of the Great Pyramid of Giza, while the "technological" aspects of the Ark (shooting out bolts of fire, striking people dead, etc) had alerted me to the existence of out of place technologies in antiquity. The stage was now set for my next project - a worldwide investigation into the possibility of a lost, prehistoric civilisation that resulted, in 1995, in the publication of Fingerprints of the Gods, undoubtedly my best known book. Keeper of Genesis (co-authored with Robert Bauval) followed in 1996, looking specifically into the mysteries of the Great Sphinx of Giza, and then in 1998 Heaven's Mirror, photographed by my wife Santha Faiia, which shows why many ancient sites in all parts of the globe replicate the patterns of constellations on the ground and are aligned to important celestial events such as the rising points of the sun on the equinoxes and the solstices. In 2002, I published Underworld, the result of five years of scuba diving across all the world's oceans to find ancient ruins submerged by rising sea levels at the end of the Ice Age.

After Underworld, I decided to step away from lost civilisation mysteries for a while and my next non-fiction book, Supernatural: Meetings with the Ancient Teachers of Mankind, published in 2005, focussed on shamanism, altered states of consciousness and the astonishing universal themes that appear in rock and cave art from deepest antiquity right through to the paintings done by shamans in the Amazon rainforest today.

From my years as a journalist I've always distrusted armchair theorising and believed I have a responsibility to seek out direct personal, "boots on the ground" experience of what I'm writing about. That was why I did five years of often difficult and dangerous scuba diving for Underworld. And it's also why, as part of my research for Supernatural I travelled to the Amazon to drink the visionary brew Ayahuasca with shamans there. As well as better equipping me to write Supernatural, my experiences in the Amazon changed my life and brought out a new side of my own creativity. I've continued working with Ayahuasca ever since and in 2006, during a series of sessions in Brazil, in a ceremonial space overlooked by images of a blue goddess, my visions gave me the basic characters, dilemmas and plot of the book that would become my first novel, Entangled, published in 2010. Entangled tells the story of two young women, one living 24,000 years ago in the Stone Age, and the other in modern Los Angeles, who are brought together by a supernatural being to do battle with a demon who travels through time.

Since the publication of Entangled I have also written the first two volumes of a series of three epic novels about the Spanish conquest of Mexico - the War God trilogy. The first volume, War God: Nights of the Witch, was published in 2013, and the second volume, War God: Return of the Plumed Serpent, was published in 2014. The third volume, War God: Apocalypse, is already more than half written and will be completed in 2016 and in the meantime my new non-fiction book, Magicians of the Gods, was published on 10 September 2015. Magicians is the sequel to Fingerprints of the Gods, and presents all the new evidence that has emerged since 1995 for a great lost civilisation of prehistoric antiquity and for the global cataclysm that destroyed that civilisation almost 13,000 years ago - a cataclysm on such a scale that it forced mankind, as Plato put it, "to begin again like children with no memory of what went before."

My ideas on prehistory and on the mysterious nature of reality have made me something of a controversial figure. In 1999, for example BBC Horizon made a documentary ("Atlantis Reborn") attacking my position on the lost civilisation. But part of that documentary was found by the UK's Broadcasting Standards Commission to be unfair - the first time ever that the flagship Horizon series had been judged guilty of unfairness. The BBC took the problem seriously enough to put out a revised re-edited version of the programme a year later. More recently, in 2013, my TED talk "The War on Consciousness" was deleted from the TED Youtube channel on grounds that TED itself later admitted to be spurious by striking out every one of the objections it had originally raised to my talk. TED, however, refused to restore the talk to its Youtube channel resulting in dozens of pirate uploads all over the internet that have now registered well over a million views.

I make mistakes like everyone else, but ever since my time with The Economist I've felt it is important to strive for rigour and accuracy, to check facts, to set out my sources clearly and openly for all to see and to admit my mistakes when I make them. As I continue to explore extraordinary ideas in my works of non-fiction, and in my novels, I'll also continue to do that.