After the Crit I made a few changes to my book cover and poster. On my book cover, I changed the colour of Marlowe's trousers to match the colour on the poster, as the general opinion was that it looked much better. I also added a drop shadow to the title as I was worried that the title didn't really stand out enough. The female characters hair was also darkened to match the trousers on Marlowe because it frames the whole cover better, I asked around the class and most people seemed to agree, which I believe validates my choice.
On my poster I changed the title to match the one on the book, including the drop shadow. I believe this will increase the brand continuity, leading to better recognition by the public. No other changes were made as the rest of the poster was already pretty simple.