Cover of When You Forget Me – The Secret of the Chronoscope by Gerd Cosmic English edition · Print & Kindle

Mystery · Time travel · Puzzle novel

She wanted to return to her life. Not yours.

Leonie wakes up two thousand years too early. Jule wants to help her. But when photographs, messages and memories begin to change, getting home is no longer the only thing at stake.

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An impossible arrival

What if going home erased someone else?

A small museum. A chronoscope hidden in its basement. Two young women trying to save each other – and discovering that helping someone is not the same as deciding their life for them.

The wrong time

Leonie recognises the city, yet nothing fits. Her group is gone, her jacket has vanished, and the year is two thousand years earlier than it should be.

The changing photograph

Jule disappears from the museum’s group photograph. Leonie stands in her place – as if the image has rewritten more than a single moment.

Your own voice answers

A call reaches a number that should not exist. Their own voices answer from a reality where the same afternoon has already taken a different path.

Room for both

The closer they get to the truth, the more urgent the question becomes: can both of them get home without taking over the other’s life?

“Your face is in the photograph. But it is her life.”

Across two timelines

A mystery that asks you to think

The novel combines time-travel suspense with friendship, self-determination and a question that grows stranger with every clue: how solid is the boundary between two minds?

A layered mystery

Altered photographs, borrowed memories and a machine that seems to know Leonie and Jule better than they know themselves.

Two heroines, two choices

Neither woman has to disappear for the other to win. Their connection can become a strength – if each keeps her own place.

A 21-part puzzle journey

The story reads uninterrupted. Afterwards, 21 puzzles invite readers back into its clues, followed by a separate solutions section.

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When You Forget Me

The Secret of the Chronoscope

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