I love the idea and the implementation!
However, I have a hard time remembering which day something happened, so I would constantly want to use a search function.
Blogged a lot on my phone during the day, then decided to sign up for the account. Stuff synched. A little later Logged in from chrome on my computer, got a blank page for the day. Checked back on my phone, and everything gone here also.
Did I mess up? Can I get the day back somehow? Could it happen again?
Fixed the bug + added the option to restore empty notes from local DB. It might not restore your note (apologies for that!) but this should never happen again.
You could color code results from the same author or from the same series as an already added book, since the user most likely already knows about them. Perhaps a toggle to filter these out altogether.
I don't see this method working very well for me since I always use duvets that are wider than the bed, which I thought was the norm. Same width as the bed makes for tug-of-war with the sleeping partner.
120 cm wide bed -> 150 cm duvet,
140-160 cm bed -> 240 cm duvet