Complex sentence: Seabury Quinn (aka Jerome Burke) (1889-1969) was a pulp fiction author most famous for his stories of the supernatural detective Jules de Grandin, published in Weird Tales to great success.
Split into simpler sentences: Seabury Quinn (aka Jerome Burke) (1889-1969). Pulp author most famous for his stories of the supernatural detective Jules de Grandin, published in Weird Tales to great success.