The Easter Island Incident(1999)
(The fifth book in the Unexplained series)
A novel by Terrance Dicks
A story in the UNEXPLAINED series in which the mysterious statues of Easter Island seem to exert a strange force, but when Matt and Professor Stirling arrive there, they find evidence of another more sinister force - aliens with a terrible plan.
Used availability for Terrance Dicks's The Easter Island Incident
February 1999 : UK Hardback
February 1999 : UK Paperback