I recently got an ipad (1). I have installed other ebook reader apps in addition to iBooks. I purchased an ebook from barnes &noble and when I try to download it, it tries to download it into iBooks. That fails. Barnes&Noble's support says I need to change my default so that iBooks is NOT the default. I can't find how to un-default it. I found no reference to it in the manual and I've done google searches for it and there just doesn't seem to be anything out there about this. Thanks.