Vintage 60s 70s Softcover Chapter Book lot - bundle of 6

This is a lot of books from the 60s and 70s. They are all softcover with wear to the covers. See last pic for the type of wear. Unless otherwise noted, books have clean and unmarked pages, with no rips, tears, stains. All books have pages starting to yellow.  1. The Runaway Robot - by Lester Del Rey 3rd printing 1967 2. Ghosts Who Went to School - by Judith Spearing 2nd printing 1967 3. Tales from the Green Fairy Book - From a Collection edited by Andrew Lang 7th printing 1972 4.The Hot-Water Bottle Mystery or The Very Hot Water Bottle - Alan Delgado 1st printing 1967 5. Herman Melville's Moby Dick - Adapted for young readers by Felix Sutton 1st printing 1973 6. Alligator - By Evelyn Shaw, Pictures by Frances Zweifel 1972 (This one has more wear, including pencil underlining and circling on some of the pages, as well as a small rip on the acknowledgement page. Sorry, my son loved this one, haha)