Problem finding iBooks.
I live in the united states and have been reading thenGars of War books purchased through the iBooks app on my iPad. The first three are available on the app but the 4th book Coalition's End however will not show up within the app for me to purchase. However, when I google 'Gears of War: Coalition's End iBooks' it tells me that it is indeed available in the bookstore and I of course click it and the app says it cannot be found.
I was just wondering if anyone else has had a problem like this and how/if it got resolved. Is there a way I could contact apple via email to sort this out?? Looking on their website I can't seem to find the 'Email Us' option I am looking for.
I appreciate and help or feedback that I receive. Thank you and have a good day.
P.S. I even went as far as emailing the author Karen Traviss and she says it does show up on her iPad but she lives in the UK and I know that the iTunes stores vary by country.