The Sea of Terror (Once Upon a Tim #3)

by Stuart Gibbs (Author) Stacy Curtis (Illustrator)

Reading Level: 4th − 5th Grade
Series: Once Upon a Tim

Join Tim and his friends on a treacherous journey across the seas in the laugh-out-loud funny, highly illustrated third book of the New York Times bestselling Once Upon a Tim series from Spy School author Stuart Gibbs.

After helping Princess Grace foil the villainous Prince Ruprecht--twice!--junior knights Tim, Belinda, and Ferkle are on a new quest--this time to recover the Queen of Merryland's precious golden fleece (and more importantly, the protective amulet in its pocket) from the Kingdom of Dinkum. The safety of all Merryland depends upon them. But first, they must face the deadly Sea of Terror and the dastardly perils it contains. Tim and his friends will have to use every ounce of bravery, valor, and intelligence they possess to navigate the treacherous waters--or else risk becoming flotsam on the waves.

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Kirkus Reviews

More knightly shenanigans, tongue deeply in cheek.

Review quotes

Stuart Gibbs
Stuart Gibbs is the New York Times bestselling author of the Charlie Thorne series, FunJungle series, Moon Base Alpha series, Once Upon a Tim series, and Spy School series. He has written screenplays, worked on a whole bunch of animated films, developed TV shows, been a newspaper columnist, and researched capybaras (the world's largest rodents). Stuart lives with his family in Los Angeles. You can learn more about what he's up to at
Lexile Measure
Guided Reading Level
Simon & Schuster Books for Young Readers
Publication date
May 09, 2023
Once Upon a Tim
BISAC categories
JUV019000 - Juvenile Fiction | Humorous Stories
JUV037000 - Juvenile Fiction | Fantasy & Magic
JUV001000 - Juvenile Fiction | Action & Adventure
JUV028000 - Juvenile Fiction | Mysteries, Espionage, & Detective Stories
Library of Congress categories
Humorous stories
Adventure and adventurers
Adventure stories
Knights and knighthood
Humorous fiction

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