The book creator is currently set up so that only autoconfirmed accounts can save a book. This seems illogical, when we allow a newly-registered account to create a mainspace article, user page or user sandbox page with their first edit. This comes up regularly at the help desk.
I proposed at the enwiki Village Pump that we allow newly-registered accounts to save books to their user space, and modify the book creator's user interface to make this clear.
Version: unspecified
Severity: enhancement