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​The I Told You So! Series: Funny Chapter Books Starring William & Thomas

Welcome to the I Told You So! series by Mark Gunning the Author—where trouble has two names: William and Thomas. These laugh-out-loud chapter books are packed with wild adventures, prank disasters, and schoolyard chaos. Perfect for kids ages 6–10 who love hilarious stories, lovable characters, and just the right amount of mayhem.


🔘 Start Reading

Cover of The Adventures of William and Thomas, a fun and engaging book for kids ages 7-10, filled with friendship and school
Cover of Strike Three, You're Out, an exciting adventure for kids ages 7-10, part of The Adventures of William and Thomas ser
Cover of The Journey Continues, an exciting sequel in The Adventures of William and Thomas series, perfect for kids ages 7-10
Cover of Back For More, the thrilling fourth book in The Adventures of William and Thomas series, filled with new adventures
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