Release notes (v1.0.1):
Hidden Books
Place EPUBs in a .hidden/ folder of your SD Card root directory. They won't appear in the book list, recents, or auto-reopen on boot. Long-press the back button (~3s) and release it on the book list to access them.
Auto-Sleep Timeout
Settings → Auto Sleep. Cycles through: 1 / 3 / 5 / 10 / 20 / 30 min / Off. Default remains 10 min.
Fix
Reading time in Stats now updates live while a book is open, not only after closing it.