Boundaries — T.M. Wright

David and Anne Case were linked as only twins can be, always aware of each other's thoughts and feelings. Now Anne is dead - murdered - and David cannot accept the fact that she is gone.

Determined to contact Anne, to discover from her shade the name of her killer, David takes an experimental drug and crosses the boundary between life and death. But the "other side" is a mysterious and confusing place and Anne is not easily found.

Anne's murderer knows of David's search...and that its success will be his destruction. David Case must never re-cross the border to the world of the living.