Alan E Nourse 
Trouble on Titan 

The tenacious Colonel Benedict and his son, Tuck, are sent to Titan, Saturn’s fifth moon, to investigate reports of smuggling. Soon they discover that the less-than-friendly colony is hiding much more than just a smuggler. Together they dig up a scandalous case of interstellar sabotage and what the colonists reverently refer to as ’;THE BIG SECRET, ’ which could destroy Earth’s power supply – forever.Can the Colonel and Tuck resolve an age-old dispute between the Titan colonists and Earthly authorities before the clock runs out? Mankinds fate depends on it . . .