Lob by Linda Newbery
Stand quietly in a park, garden, or the woods one day. Listen! Watch! If you are one of the lucky ones, you will see him. Lob! A green man. You have to be a special person to see Lob, that's what Grandpa Will says. Lucy's parents don't believe he exists, but Lucy does. And she's delighted when she finally catches sight of the Green Man in Grandpa's garden. Then something awful happens, and Lucy feels that her life has turned upside-down. Back at home in London, she wonders whether she'll ever see Lob again. Will he come and find her? Linda Newbury, with the vivid embroidery of Pam Smy's illustrations, has conjured a real green man right out of the woods and stories of legend.