When all else fails, read the manual. When you see it and happen to be online....
In case anyone else is looking for the widgets: On the homescreen, press an empty spot away from anything else you have on there. It goes into a homescreen "edit mode". Look at the bottom. There are two boxes, one to set wallpaper and one to choose widgets. Tap the widgets box. All available widgets show up. CC has 4 to choose from. Pick the one you like; it will ask how many books. It starts small, but you can adjust the size of the widget by pulling the handles.
(Put control/setting of an App widget with App details, on or around App screen, with App manager...? Of course not.

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