Complex sentence: Chick tracts are short evangelical gospel tracts, originally created and published by American publisher and religious cartoonist Jack Chick; after his death his company (Chick Publications) continues to print them using other authors working for the company.
Split into simpler sentences: Chick tracts are short evangelical gospel tracts, originally created and published by American publisher and religious cartoonist Jack Chick. Since his death, his company (Chick Publications) has continued to print new tracts using other authors working for the company.