You can get this on the main downloads page, or directly here: http://www.reexamine.org/images/counseltowatchtowermissionaries.pdf
This is the 'counsel' (A.K.A. contract) between missionaries and the Watch Tower. Someone would recieve this after completing the Giliad training school.
Also, we now have the Pay Attention book, and the OD book in Polish, as well as German and English.