key "read_arrav" should be set true when getting the book from the bookcase, not upon reading it
1e_Luis/Quests/Shield of Arrav/Phoenix Gang/Part 1 at 00:49:10, Luis takes the Shield of Arrav book from the bookcase, drops it without reading it, and talks to Reldo. (Smart btw, good QA). Reldo's dialogue is advanced, even though Luis didn't read the book and didn't possess it in their inventory. Therefore, this "read_arrav" key should be given when getting the book from the bookcase, since that's what it's actually checking.
In OpenRSC, Reldo's dialogue doesn't advance until the player actually reads the Shield of Arrav