John Harris 
Funny Place To Hold A War [PDF ebook] 

Ginger Donnelly is on the trail of Nazi saboteurs in Sierra Leone. Whilst taking a midnight paddle with a willing woman in a canoe cajoled from a local fisherman, Donnelly sees an enormous seaplane thunder across the sky only to crash in a ball of brilliant flame. It seems like an accident…at least until a second plane explodes in a blistering shower along the same flight path.