Jamie and the Vikings

Jamie is a grade-school-age boy with a love of history, who unfortunately finds himself facing the wrong end of a bully's fist. He lives with his mum a widow, a lovely woman who misses her husband terribly.
Jamie's curiosity, a library book, and his quest for adventure take him to the magical and mystical Lithia Library, which is run by a formidable and awful woman named Mrs Humbleweed, who traps him there. Even though he eventually escapes, Jamie is later compelled by curiosity to return to the library with his best friend, Caitlin where past and present collide in a race against time.
With the help of a mysterious journal, a marble mouse, and a young Viking named Astri, Jamie must grapple with Vikings and time travel to save Caitlin and return to his home.