Ultima Online Protocol :: Book Contents
Packet # Packet Name Length Client Server Obsolete
0x66 Book Contents dynamic X
Data Type Description
byte 0x66 The packet number.
ushort Size The size of the packet.
uint Serial The book's serial.
ushort Pages The number of pages being sent.
    ushort Index
    ushort Lines
        char[] Text
        byte 0x00
This loop contains information relative to each page being sent. Loop for Pages.

Index: The page's 1-based index within the book (not the loop).
Lines: The number of lines on the page (normally, the maximum should be eight).
         - If this is 0x0000 in a client message, it is a request for the page contents.
Text: The text to appear on a certain line.
0x00: Null terminator for a line of text.

Packet Description:
This is sent by the server to display book contents, and by the client to edit book contents.