53 verified book/e-book registration blocks (KDP, Korean ISBN, Kyobo, Payhip) with fixes.
Free
One server, in content management. 53 verified book/e-book registration blocks (KDP, Korean ISBN, Kyobo, Payhip) with fixes.
Content Management
53 verified book/e-book registration blocks (KDP, Korean ISBN, Kyobo, Payhip) with fixes.
The rest either hold an API key issued by the publisher or ask for nothing.
Listed without a verification tick. Read the listing before installing.