Can you do better? Guess what: I ended up buying a book! :)

Another delightful feature of the updated iPad app is the introduction of the visual sliding history. If you slide the main page from left to right, the app discloses a hidden panel that displays all recently performed searches.
Paper, which is a free sketching app on the iPad, has a lovely implementation of the undo. It was kind of tricky to bring up the undo, but when I figured how, it was just beautiful.
In the last few years I participated to many discussions about browsing versus searching. I am personally more inclined to search than browse, but recently I am fascinated by a new emerging modality of information seeking: serendipity discovery.