"there's Klingons on the starboard bow / wipe 'em off, Jim!"

Since all knowledge is contained on the interwebs, some advice please: which of these works best as a starter Andre Norton? Why or why not?

The Defiant Agents
Key Out of Time
Plague Ship
Ralestone Luck
Rebel Spurs
Ride Proud, Rebel!
Star Born
Star Hunter
Storm Over Warlock
The Time Traders

---L.