To make the book, place your copy of Saradomin's holy book on the Bookmaking table. Then click proceed through the 4 steps of the book making process. Each step uses 200 prayer points. If you don't have enough prayer points, run to the altar upstairs, then come back and complete the process. This also gives 10,000 Prayer xp and 10,000 Crafting xp the first time you make it. The Illuminated book of wisdom, along with other illuminated books, can be stored in the bookcase of your Player-owned house.