The Friend book is a feature which lets players manage their friends and followers.
Players can see their personal tag from this panel and enter other players' personal tags. Sharing personal tags lets players send friend requests, much like neighborhood tags lets players join a neighborhood.
Players can also accept or decline friend requests, and block players who have requested to be their friends. Requests are limited to 50 pending ones per day.
The request feature can be disabled entirely.
In-game friends panel
Players can see, remove or block their in-game friends from this panel. Players can have up to 150 in-game friends.
Other friends panel
Players see and hide their GameCenter and Facebook friends from this panel. Hidden friends do not show up in the friends bar.
Players can see the farms they follow on this panel as well as their own followers.
Players can follow up to 10 farms. These are denoted with a blue-colored square around their avatars.
They can also hide and block their followers from this panel. Hidden followers do not show up in the followers bar. Blocks are effective for 30 days and can be removed at any time. Players can still visit the farms of blocked players.