Give a Role Full Control of One Post Type Only
Gives a custom post type its own permissions and lets a chosen role (for example Author) manage it fully, including others' items, without extra rights elsewhere.
Snippet Library
Custom Post Types & Fields snippets for WordPress
Snippets for custom post types, taxonomies and custom fields: register a post type, add meta boxes, show fields in lists and archives. For developers modeling content beyond posts and pages.
Stop Non-Administrators Deleting Items of a Post Type
Lets editors and authors edit entries of chosen post types but only administrators can trash or delete them, protecting records like locations or products.