Martin McDonagh wrote Seven Psychopaths. Seven Psychopaths is starring Tom WaitsSeven Psychopaths is written by Martin McDonagh
[Human]: Could you recommend where to go to find information on Martin McDonagh [Assistant]: Martin McDonagh wrote Seven Psychopaths [Human]: That sounds interesting do you know if that comes in an ebook? 
Unfortunately, Seven Psychopaths is only available in physical book form. You may want to check out Tom Waits' autobiography though, it's a great read!