THIEPN Account
Account & sync
Checking account status…
Keep reading without an account
Library remains fully usable as a local-first reader. If THIEPN Account is already signed in, Library connects automatically. You can also connect manually without signing into Library separately.
Signed in
THIEPN Account
Private cloud sync
Library reading state
Your local reading data will not be uploaded until you enable sync.
No cloud sync enabled.
What reading-state sync includes
Saved books, EPUB/PDF progress, bookmarks, highlights, notes, reading activity, reader settings, and portable personal-book metadata.
Personal EPUB/PDF bytes are never placed inside the reading-state snapshot. File continuity is a separate permission below. Local cover blobs remain device-local.
Optional file continuity
Personal book cloud
Checking private-file permission…
Personal files are separate from reading-state sync.
When you explicitly allow this sensitive permission in THIEPN Account, Library can privately store personal EPUB/PDF files up to 50 MB so another signed-in device can restore them automatically after metadata sync.
Manage Personal book cloud permissionObjects are private, owner-scoped, and named by SHA-256. Books over 50 MB remain device-local and can still be relinked by importing the original file.
Cloud-data lifecycle
Deletion is managed centrally by THIEPN Account with a deletion review, recent-authentication check, and revision-conflict protection. Local reading data and personal files on this device are not erased.
Manage Library cloud data in THIEPN AccountManual backup & restore remains available independently of Account sync.