What is the third book after the trilogy of the wilderness written by the lonely soul under the tree?

The trilogy written by the lonely soul under the tree was the Netherworld Record. The Record of the Netherworld was one of the three novels in the Wilderness Trilogy and also one of the representative works of the lonely soul under the tree. This novel was about the underworld and the netherworld. The content was grand and the writing was beautiful. It was regarded as one of the classics of online literature. Other than Search for the Gods and Desolation, the Ghost Under the Tree did not write any sequels, so Netherworld Records was considered the final work of the Desolation Trilogy.