The order journal pages are found around the Monastery of Ascension and dropped by the slayer creatures there. There are 22 pages total, and they are automatically added to the History of the Order book when one is found. Three can be found from the library in the dungeon, and another from the lectern next to it. The remaining 18 pages can be found by any of the monsters below and all pages can be dropped by the same monster.
Drop sources[]
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Attempting to telegrab the page would bring the message: "The page looks very delicate, you better pick it up carefully."
Even though the pages are added directly to the book, if you attempt to pick up a page with no inventory space, you will be unable to add the page until you have an open slot.