Books in the Dcs Palmer & the Serial Murder Squad Cases 1 & 2 series

In Burning Ambition a burnt-out prison van with three pre-murdered bodies inside doesn't make sense. Especially as one of the bodies wasn't a prisoner and should not even be there. Why would these three be killed and what has it to do with the final signature heist being put together by an Organised Crime boss to rob the Royal Mint in Wales? In Takeaway Terror delivery boys on scooters working for a reputable meal delivery service are being targetted and mown down by a large van. Palmer thinks this has something to do with two organised crime gangs who are about to go to war for the lucrative London West End drugs trade. When an old adversary with skills in bomb-making joins one gang Palmer must act and act fast. Will anybody be left standing once the bullets fly, including Palmer?