The River of Adventure
by Enid Blyton (Macmillan, 1955)
audiobook read by Thomas Judd (Bolinda, 2021)
All the usual adventure elements but peppered with best British bias. The children travel to the Middle East with Bill and ‘his wife’ (aka their aunt/mother!) and win through thanks to the locals—especially the villainous element—being credulous, craven and unchristian.