Following an education in Chemistry, he worked in computing for the next 30 years. Since 2000, he has devoted his life to the study of Advaita and making this teaching more accessible to seekers.

His first book, 'The Book of One', provides a summary of the entire teaching. It was published in 2003, extensively revised and republished in 2010.

An introductory book on Sanskrit 'The Spiritual Seeker's Essential Guide to Sanskrit' was published in India in 2005. His book 'How to Meet Yourself', published in 2007, was aimed at the non-specialist reader and addresses the fundamental topics of meaning and purpose in one's life and the nature of happiness.

'Back to the Truth’ (2007) is a systematic treatment of Advaita which, by using examples from many sources, helps the reader to differentiate between approaches and teachers. It compares the scriptures of traditional Advaita with the words of contemporary Sages and with the modern ‘nothing to be done’ teaching of neo-Advaita. This is scheduled to be completely revised in 2021-22 to ensure that definitive, traditional explanations are available for all key aspects.

'Enlightenment: the Path through the Jungle' was published in 2008. This aimed clearly to define the term enlightenment and dispel the many myths about it propagated by new-age books on the subject. It endeavored to set down the proven methods, passed down for over a thousand years in the traditional teaching of the subject and contrast these with Western approaches, demonstrating in the process that only the traditional methods are likely to bring about enlightenment.

‘Advaita Made Easy’, published in 2012, summarizes the essentials of the subject in a short, easily assimilable form.

‘Sanskrit for Seekers’ (2014) gives the reader just enough understanding of the language to be able to use a Sanskrit dictionary.

‘A-U-M: Awakening to Reality’ (2015) is a presentation for the modern reader of the Mandukya Upanishad and Gaudapada kArikA-s. The original text is probably the most advanced (and complete) exposition of Advaita but is notoriously difficult. This work avoids the verse by verse analysis and instead deals with the material on a topic by topic basis with cross-referencing to the relevant verses.

‘Time for the Wind’ (2015) is a novel, an ecological thriller which also gives an insight into Advaita philosophy as part of the plot.

‘Answers… to the Difficult Questions’ (2019) presents the questions that hundreds of seekers asked over the previous 15 years, and the answers given. Questions are organized into topics, with introductory and summary sections, together with extra material and clarifications where appropriate.

Dennis maintains the most popular website on Advaita at www.advaita.org.uk. There is an integrated blogging facility at www.advaita-vision.org. You may also browse a portfolio of his photographs (a lifetime hobby) at http://dwaite1.500px.com/.