Legacy of Kain Resources
In addition to the Legacy of Kain games, there are a few other resources around which clarify or expand on certain plot points. Printed strategy guides were produced when each game was released, and the game manuals contain background information.
Legacy of Kain fans have been very lucky as the developers of the games have gone beyond this, and have engaged with the fan community. See Links To Official LoK Info for the additional official resources they have produced, which include websites, developer FAQ/Q&A sessions and Developer Diaries.
This section also has Links To Fan Websites.