From Amazon:

The tramp-freighter spaceship Solar Queen had exclusive trading rights to Sargol and its fabulous gems. But the crew's bravery and resourcefulness strained to the breaking point as they met Sargol's three challenges: the enigmatic obstinancy of the planet's catlike natives, ruthless incursions of an illegal competitor, and worst of all -- an invisible, undetectable stowaway whose presence branded the Solar Queen a plague ship ...off limits to the rest of the galaxy!

Standard but engrossing space fantasy from a prolific author.

Dane Thorson, the young apprentice cargo master on the Free Trader "Solar Queen" is on just his second mission with the ship when he's confronted with the threat of alien plague. It's down to him and three other relative youngsters to rescue the ship from certain destruction when the rest of the crew become catatonic with suspected plague.

Norton delivers, as always: fast paced adventure with plenty to keep the reader interested.

Excellent space romp. Offering this to new readers with the first and third in the Solar Queen series.

On the BookCrossing stand in the Lending Library.