R. J. Barker Books

Age of Assassins

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Girton Club-foot has no family, a crippled leg, and is apprenticed to the best assassin in the land. He's learning the art of taking lives, but his latest mission tasks him with a far more difficu...

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If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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