If your friend is not in the list of friends, you need to invite him/her to install our app. You have to click on "Click here to Invite a friend", and select the friend(s) you want to invite. (Since Facebook has made some changes on permissions we can't directly recover friends account.)
Your friend will receive a private message from you on Facebook with a link to our website. After this, the friend must click on "Create a My Social Book" to accept our app.
Once it's done, you will find your friend in the friends selection window.