As It Is Written is an Oriental fantasy novel by pulp writer De Lysle Ferrée Cass mistakenly republished under the name of Weird Tales writer Clark Ashton Smith.

The novel was discovered in the files of The Thrill Book magazine, where it had been accepted in 1919, by Murray and Daryl S. Herrick.

Based on various evidence including handwriting and typewriter comparisons, and similarities of subject matter and style, they believed the novel to be the work of Clark Ashton Smith using Cass as a pseudonym.

Murray showed the manuscript to Donald M. Grant and Sidney-Fryer who both agreed it to be the work of Smith.

The novel concerns the adventures of Datu Buang who, as a fugitive, stumbles across the remains of an alien lost city in the jungles of Malaysia and battles furiously with a semi-intelligent ape-creature.