Umm, I'm just wondering if I have just been ripped off here.

I have bought the RahXephon Collection Thingy & in each volume there is a booklet containing information about stuff. But, the volume 4 has no booklet, so im just wondering if there is supposed to be a booklet & if i have to order in the volume again (in which i dont mind doing)

I have checked in the site which the provider in town gets it from (madman) to check if it does, but infact it is the only volume where it specifically indicate that there is a booklet, so im confused.

Any help would be good. Thanks

(& also, is there only 3 volumes of the manga in english?, or is there more to be released)