If you want to deliver a message to a certain person from my friends I think you know his and brida eBook go sent him a letter because I don't know you and I don't want to know you
If you want to deliver the message to a specific person of my friends I think you know his eBook go to him and sent him a message: for I do not know you do not want to know you
If you want to deliver a message to a particular person from my friends, I guess you know go to email addresses and send him a message, because I do not know you do not want to do.