There are 3 books in the Cell 7 series. The newest book is Final 7 which came out in 2018.

1
Cell 7

Book cover of Cell 7
Should she live or should she die? You decide.

A heart-stopping thriller. Shortlisted for the Lancashire Libraries Book of the Year 2018.

An adored celebrity has been killed. Sixteen-year-old Martha Honeydew was found holding a gun, standing over the body.

NOW JUSTICE MUST PREVAIL.

The general public will decide whether…
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2
Day 7

Book cover of Day 7
The tense and thrilling companion to Cell 7.

Martha Honeydew has been released from the terrifying Cell 7. But despite her new freedom, the corrupt judicial system is still tracking Martha's every move. And Isaac, her only trusted friend, is now imprisoned in the very same cells she was. Isaac…

3
Final 7

Book cover of Final 7
The newest high-octane addition to the thrilling Cell 7 series

Martha and Isaac have escaped, but are now on the run - the government has branded them rebels and a danger to the public. Despite the rewards being offered for turning them in, Martha and her friends are safe in…