On his 21st birthday, Leo Trevelion discovers he is the last of an ancient guardian race and the only thing standing between Earth and total annihilation.

Raised without answers, Leo has always felt like an outsider. But when a vision leads him to his grandfather's hidden legacy, everything changes. Beneath the Earth's surface lies Leonisia, a breathtaking civilization of advanced technology and ancient power, home to a peaceful race who have lived in secret for millennia.

They are waiting for him. They have always been waiting.

Armed with the legendary Lion Ring and guided by the enigmatic winged horse Muzhai, Leo must master powers he barely understands as the amphibious Vraegil prepare to cross worlds and destroy everything Leonisia has built. The planetary alignment is coming. The invasion cannot be stopped - only survived.

Leo Trevelion and the Lion Ring is an epic science-fantasy adventure blending ancient mythology, hidden civilizations, and high-stakes interworld conflict - perfect for fans of Dune, The Mortal Instruments, and Percy Jackson.

Book 1 of The Trevelion Trilogy. "A fast read - Ian's writing style was easy to fall in and at times it was difficult to break away" - Journey with a Cinephile (7/10)

The story continues in Book 2: Leo Trevelion and the Golden Orb - coming soon.

Also by Ian Flint: Phantom Relics of Cheswick Hall