Library of America has published her major works in 2 attractive
volumes: https://loa.org/writers/308-zora-neale-hurston
Library of America - Hurston

The Heminway/Walker biography remains in print: http://www.press.uillinois.edu/books/catalog/75wfe2mn9780252008078.html
Hurston - A Literary Biography

Best wishes, Thomas.