Perhaps you should try some spelling variations:
"michael heller author" » "michael goller author", "michael muller author", "michael hall author", "michael feller author", "michael helme author", "michael miller author"
"michael kelly author" » "michael della author", "michael kirby author", "michael kelly anthony", "michael only author", "michael perry author"
"michael henry author" » "michel henry author", "michael henein author", "michel henry's author", "michael theory author", "michael henry arthur", "michael hervey author"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("michael kelly author") OR ("michael henry author"))) OR ("michael heller author")).
• Removing quotes may allow a broader search: (((( michael kelly author ) or ( michael henry author ))) or ( michael heller author )).
• Adding a wildcard symbol may retrieve word variants: (((("michael kelly author") or ("michael henry author"))) or ("michael heller author"))*.