Diablo - the Secret of Echo Lake

"Wow! A Message is a Bottle! or is it a treasure map! Whatever it is, its bobbing in the middle of Echo Lake. and it may hold the key to certain mysterious events. including the recent rash of burglaries. Could it have anything to do with Lillian's friends serious riding accident. One things for certain, the secret of Echo Lake is going to lead Ricki, her beloved horse Diablo, and their best friends once more down the path of high adventure."--Page 4 of cover.