How does the text differentiate between a 'Guru biography' and other 'knowledge texts'?

The source material in Chapter 0 draws a clear distinction between these two types of texts. It states that knowledge texts are primarily for imparting worldly and spiritual knowledge. In contrast, a Guru's biography is defined as a reliable and true book specifically describing the Guru's incarnation, life stages from childhood to old age, their wonderful plays (Leelas), incomparable miracles, and the significant works of their incarnation. While both can be used for spiritual growth, the Guru biography's focus is on the life and acts of the Guru as a source of inspiration and service.