While it is true that popular thriller author "Jack Higgins" is an alias for a "Harry Patterson", who also occasionally uses the alias "James Graham", there are other authors for all of these names. Therefore do NOT combine them.
1. Jack Higgins is the principal pen name of English novelist Harry Patterson (b. 1929) He has also used the pen names Hugh Marlowe, Martin Fallon, and James Graham
2. Jack Higgins (born August 19, 1954) is an American Pulitzer Prize-winning editorial cartoonist for the Chicago Sun-Times.