Well, it could be. My novel In Knives we Trust is not displayed on the open shelves in W H Smith’s- if you want to buy one you have to ask because they are kept behind the counter. This is because two people have complained about the title on the grounds that it glorifies knife crime, apparently. This is an opinion from people who have not read the book, of course.
If you want to a copy it might be easier to buy one from me – use the link in the menu above and I will dispatch or deliver one immediately.
Or go to Waterstones – unless they have taken it off the shelves too!