From guest blogger editorial consultant Cressida Downing
I get a number of submissions where the author, in their covering letter, mentions that they have put the manuscript out to a number of friends, all of whom loved it. They laughed, they cried, they think he/she should be published. This tells me nothing except that the author has kind friends.
Think about it – if your friend gave you their manuscript, mentioned they were going to send it to an agent, and asked what you thought (outside of a supportive creative writing group), what would you say?
So unless your friend is a publisher (in which case they will already have snapped you up if it’s that good) or a famous author, it’s not worth putting in your covering letter.