Endangered Species
Author Franklin W. Dixon
House name Franklin W. Dixon
Cover artist Brian Kotzky
Publication information
Publisher Archway Paperbacks
Publication date June 1992
Media type Print (Paperback)
Pages 153
ISBN 0-671-73100-9
Series Casefiles
Operation Phoenix Trilogy
Preceded by Cold Sweat
Followed by No Mercy


"When danger is uncaged, the only law is the law of survival."
— Tag-line from front cover

Endangered Species is the first book in the Operation Phoenix Trilogy and book 64 in The Hardy Boys Casefiles. It was first published in June 1992 by Archway Paperbacks (an imprint of Simon & Schuster).

Plot summary

"The killing fields of Kenya!"
— Tag-line from back cover

The Hardy boys join their father, Fenton on an undercover mission in Africa, to investigate a multi million dollar smuggling ring, and discover the fate of a missing U.S. Customs official who was on the trail of the gang before he disappeared.

The poachers are killing hundreds of endangered animals, for their smuggling operation, and the Hardys determined to shut them down.

Frank and Joe discover that the Customs official was killed, and are closing in on the gang, which they have discovered is Phoenix Enterprises, when their own father is killed in a tragic bombing. The brothers discovered a clue that leads them to believe that Phoenix Enterprises is based out of Stockholm, Sweden, and they vow to go there to track down their fathers killers


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