Blaze and the Indian Cave by C. W. Anderson*

Billy sleeps over night in an old Indian cave while Blaze, his faithful horse, spends the night tethered to a tree.  When Billy awakes, Blaze is gone!  Can Billy find Blaze?
*Highly recommend.
Perfect for transitional readers who want to read adventure! Great series for preschoolers who are ready to hear longer books.
-Borrowed from inter library loan.