Dreamwalkers Book One: The Intruder. A Markland Garraway Paranormal Mystery Thriller

The whole world knows who DI Markland Garraway is - the detective who proved without doubt that life continues after death.
Now he's back. Although retired from the police force he finds himself reluctantly drawn into another supernatural mystery, which once again appears to defy all logical explanation.
The case of a man: once missing, now returned, but who is strangely different.
Garraway's investigation takes him on a journey where the unimaginable proves to be real, and where those around him seem to challenge the impossible.