For some reason we do not understand my wife's iBooks icon changed to sometghing called Lifestyle and when you double-click on it her iBooks mount. What gives with name change and lame looking icon?
Are you sure that the "lame looking" icon is not a folder called Lifestyle? You may have inadvertently created a folder and the iPad named it lifestyle.
Tap the folder once to open it and see if the iBooks icon is in it. If it is, tap and hold down on the icon until it wiggles and then drag it outside of the folder onto the cscreen. Tap the home button and the apps on will stop wiggling. Tap the screen to close the folder.