Books can be found under Actor->Decoration->ThieveryObject->ThObjectReadables.
Quick guide:
Whack a ThObjectBook in your map and then bring up it's properties. Fill in the "ThBookContent" section with text.
Details:
ThObjectReadables section of properties
This specifies the layout and style of the book. It specifies things like the location of the columns, etc. This has to match the backdrop image and suchlike, so you shouldn't really change this stuff. The only thing you might want to change is the starting font.
Font - Specifies the starting font. Only two choices at the moment.
These tags can be placed amongst your book content to do special things.
E.g. <IMG=ThieveryMod.DaggerSketch>
E.g. |<FONT=Copperplate>|
(the bars are there to ensure it's on its own line)
E.g. |<NEWCOL>|
(the bars are there to ensure it's on its own line)
This ThPickup allows the player to have a portable book. It basically acts as a proxy to a proper book. So place a normal ThObjectBook somewhere, hidden in a blue room outside the map or something, fill it in with text. Give it a Tag, like "BookOMagicStuff".
Place a ThPickupReadableLink where you want the book to start. Set its ReadableTag to "BookOMagicStuff".
That's it, now the player will be able to pick it up, carry it around, and when they frob with it selected, they'll read the hidden book.
--Dalai.