I don’t know if these are specifically books related to rewilding, it’s hard for me to go back and look at them with an “adult” eye, but they certainly affected me as a child and I loved them.
the Moomin Troll series, by Tove Jansson
Magic Words, by Edward Field
my Father’s Dragon, by Ruth Stiles Gannett
Warriors series, by Erin Hunter
that’s all I can think of right now…