The Debug Crew The Sleeper Code: Book 4 of the Debug Crew Series, (Paperback)

A blackout. A hidden signal. Millions of sleeping devices ready to wake...

When the entire town of Oakmont is swallowed by a sudden, mysterious blackout, 12-year-old coder Maya Chen and her best friends-hardware genius Jax Martinez and pattern-savvy analyst Lily Okonkwo-know something far bigger than a power outage is unfolding.

Then the toys begin to glow red.

Across Oakmont, smart fridges, thermostats, and even Sophie's beloved Glimmer Bear come alive, pulsing with a frightening synchronized light. The Debug Crew quickly discovers the terrifying truth:
a secret "Sleeper Code" has been planted inside millions of everyday devices... and someone has just activated it.

Now, a hidden army of hacked gadgets is launching a massive cyber-attack capable of collapsing the power grid for good.

With the internet down, the grid failing, and the town sliding toward chaos, Maya and her friends must uncover how the attack was planted, decode a rogue microchip, and outsmart the world's most dangerous hackers-before the entire system melts down.

But the deeper they dig, the clearer it becomes:
the enemy isn't outside the house. It's already in it.