Series Five is one of the Related Worlds. On one world in this series, all of its landmass has become islands the largest of which is about the same size as France. Christopher Chant met a tribe of Mermaids on this world. It turns out that the flesh of Mermaids is powerfully magical and they become Ralph Argent's victims as well.
|The Related Worlds|
|Series One, Series Two, Series Three, Series Four, Series Five, Series Six, Series Seven, Series Eight, Series Nine, Series Ten, Series Eleven, Series Twelve|