According to Precocious Curmudgeon and MangaCast, the following two books from Del Rey were released yesterday:

GENSHIKEN VOL 7 GN, $10.95
LOVE ROMA VOL 4 GN, $10.95

However, neither Diamond nor Cold Cut Distribution listed them as new releases. So where did comic book shops get them from?

Image from Amazon
Genshiken 7: The Society for the Study of Modern Visual Culture by Kio Shimoku

Image from Amazon
Love Roma 4 (Love Roma) by Minoru Toyoda