From the info provided by Diamond
Bk 1/HC (ISBN # 978196226508957500) is the Direct Market Edition
Bk 1/A (No ISBN #; just UPC #61499847345800111) is the Oversized Reserve Hardcover. If it helps, Diamond notes the dimensions as 10 9/16" x 13 1/4"
My gut tells me Bk 1/A may be the same as what you're trying to add in if the dimensions match up.