The Search for the Snow Leopard

The Search for the Snow Leopard is a Hardy Boys Digest novel, written by Franklin W. Dixon. It is the 139th volume in the Hardy Boys series of detective/adventure books and was published in 1996.

Plot summary
Frank and Joe, with their best bud Chet Morton, investigate when a princess's pet snow leopard goes missing from the Bayport Zoo. They become embroiled in a more dangerous case when the princess herself is kidnapped.