I think the book would have been an option if it wasn't left with one of the other PCs that had left the group and became a NPC. 


[i]Edit[/i]

From what I've gone through the book had only changed hands the once. That and Kendra had some interest in the possible mystery behind the slight magic sense she could glean. I think if Kythor asked her she may have given it to him, but I do not think she would have just said "here take it" without being askes.