The Secret of the Deepwater Portal

By Harley Blue

Willabrook is finally calm again.

The clocktower ticks. The river flows. The town feels safe.

Until the river drains.

When a massive glowing hole opens in the riverbed, Alex, Jess, and Sam discover something far older than time glitches or broken inventions - an entire buried city hidden beneath Willabrook.

But the ancient Undercity is waking up.

A towering stone guardian rises. A terrifying Sentinel stalks the tunnels. And when Alex is pulled into the depths by a mysterious spiral key, Jess and Sam must follow him into a world powered by memories themselves.

Deep underground, they uncover the truth about the city's collapse - and the dangerous power hidden at its Core.

If they can't stabilise it, the river won't just flood...

The Secret of the Deepwater Portal is a thrilling underground adventure about courage, friendship, and the power of remembering who you are - even when the world beneath your feet begins to wake.

• Format: Paperback
• Language: English
• ISBN: B0GPK6GXQ2
• ISBN13: 9798232416867
• Release Date: February 2026
• Publisher: Harley Blue
• Length: 70 Pages
• Weight: 0.18 lbs.
• Dimensions: 0.2" x 5.3" x 8.0"
• Age Range: 9 to 12 years
• Grade Range: Grades 4 to 7