Genesis is the fifth book of the Codification of the Spiritist Doctrine, first published in 1868. It is divided into three main parts.

The first explains Spiritism's views on the dogma of Creation and related dogmas. Exploring in detail subjects such as 'God', 'good', 'evil', 'human evolution', 'astronomy' ,and earth sciences as understood in 1868 ;

The second part deals with the dogma of 'miracles'. Exploring what Spiritism tells are their true origins and reasons for happening. Going on to dispel the idea of 'the supernatural' in any aspect of earthly life.

The third part deals with the concept of 'future predictions', its basic impossibility and Christian biblical predictions of the future.