Norse mythology drives Rick Riordan's Magnus Chase books, and the title of this third volume points towards a voyage.
Riordan's method stays consistent across his series: old myth handled with contemporary humour, a first-person narrator who undercuts the grandeur, and short chapters that keep younger readers turning pages. At 423 pages the book is substantial without being daunting, and Puffin's paperback is the familiar edition for readers collecting the sequence. Reading the earlier volumes first helps a good deal, since the characters and the stakes carry directly forward into this one.
A few specifics:
• Third book in the Magnus Chase sequence by Rick Riordan
• 423 pages in a Puffin paperback
• Norse gods and legends retold with modern humour
• Short chapters and a first-person narrator aimed at middle-grade readers
Best for readers already following the series and for young fantasy fans more generally, available through Boipoka.