Group authoring the products
First of all you have the continuity that exists between different Requiem guides that comes from the same person or group of people collaborating on the same all in one system. This helps to lessen the chance of contradictory information or misinterpretation of how to best approach the Requiem problem the guides are written to buy Requiem Lant solve. General readability of the guides also should be more consistent throughout with the same person or group authoring the products.