Deletion of Marty Appel

Comment: Notable author of several books about the Yankees and MLB.  Clearly satisfies both the general notability guidelines per  with significant coverage in multiple, independent, reliable sources, and apparently satisfies the specific notability for authors (criteria no. 3) per , with multiple published reviews of his books
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG||WP:AUTHOR)