Yesterday the Guardian and others published some of JK Rowlings rejection letters from publishers for her adult crime novels that she submitted anonymously.
Rowling shared the painful rejection letter she received for her adult crime novel under the pseudonym Robert Galbraith - which said the book could never be commercially successful.
The author was turned down by several publishers when she submitted her manuscripts anonymously.
She has now disclosed the letter sent by Constable & Robinson, a noted crime imprint, which advised her to learn more about how to pitch and to consider joining a writing class.
"I regret we have reluctantly come to the conclusion that we could not publish it with commercial success," it reads. "At the risk of 'teaching my grandmother to suck eggs', may I respectfully suggest the following."
The publisher went on to list tips and tricks to help a would-be author, including asking a helpful bookshop for advice on who would best represent their style of work, learning how to write an "alluring" 200-word blurb to sell it and picking up the Writers' Handbook.
Apologising for being unable to provide constructive criticism about the manuscript itself, it added: "A writer's group/writing course may help." It went on to wish her "every success in placing your work elsewhere".