Crystal Healing

For me its a combination of books
I like "Cigars of the Pharoah" and "The Blue Lotus" ,thats where I could really feel the adventure

I also like "Seven Crystal balls" and "Prisoners of the sun",

The most boring for me was "The Castafiore Emerald"
Loki, there are too many episodes in ship

Moon one is "Destination moon" and "Explorers on the moon"...that was also nice, when I was a kid I cried when Frank Wolf committed suicide to rescue everyone else