No one has noticed Junior Blossom"s new invention, even though Junior can plainly see that it"s marvelous. He calls it the Green Phantom and it"s almost finished--except for the final secret ingredient. The whole family make a Blossom promise to ensure Junior"s Green Phantom is a big success, and Junior knows a blossom promise can never be broken. When the Green Phantom is ready, everyone gathers to cheer Junior on, except for two people: Pap, his grandfather, who has been missing, and Mom, who is at home worried and waiting near the phone. Pap is old, and his knees are weak--where can he be? In The Blossoms And The Green Phantom, the third book of Betsy Byars"s quartet, this unforgettable family is as lovable and unpredictable as ever.