PETALING JAYA (THE STAR/ASIA NEWS NETWORK) - A commercial pilot has co-written a book on missing Malaysian Airlines Flight MH370, claiming that the disappearance was "deliberated" and "calculated".

The report, first published in The Independent newspaper, comes as Malaysia observed the 100th day of the aircraft disappearance with a fresh promise by the government that it will keep searching for its whereabouts.

The book, Good Night Malaysia 370: The Truth Behind the Loss of Flight 370, was written by pilot Ewan Wilson and New Zealand reporter Geoff Taylor.

The Independent said the pair wrote that the plane did in fact end in the Indian Ocean and that a conclusion of foul play was reached following the process of elimination.

This is the first time detailed analysis of the flight has been presented, Mr Wilson told stuff.co.nz, including the incredible route it took, and who they believed was in charge of the aircraft as it plunged into the Indian Ocean.

"The disappearance of Malaysia Airlines Flight 370 captured the world's attention and shocked everyone - (the outcome) is gut-wrenching," he said during the interview without divulging much details.

Mr Taylor said the incident was no accident and that it was deliberate, calculated and should never have been allowed to happen.

The authors had also recommended immediate changes to the management of flight crews and the introduction of tamper-proof technical systems to ensure the aircraft could be tracked at all times.

Flight MH370 with 239 people on board disappeared en route from Kuala Lumpur to Beijing on March 8 and is believed to have crashed in the southern Indian Ocean.