Awkward History Navigation
When you look at the history page, you get a nice list of all the resources you have recently used, with an arrow on the right of the screen to look at the detailed history of a particular resource. But once you click on the detailed history of a particular resource, you can't get back to the main history page. If you hit the "back arrow", you go the library or whatever resource you were looking at before going into history. There should be "previous screen" option somewhere. I would have expected to tap on the "history" bar at the top of the screen, and get a "previous" arrow, like what happens when you tap the bar when you are in a resource.
I would be even better if when you tapped the expand arrow in the history page, it still kept you on the main history page, but just expanded the detail of the particular resource (without taking you to a new page). That way you could swipe up and down the screen and still see all the history, but only expand what you want to expand.