* "Forgotten Realms": He's written numerous adventures, novels, and sourcebooks set in the Forgotten Realms campaign setting. Some of his notable works include:
* "The Legend of Drizzt" series: He co-authored several of the early novels in this popular series featuring the drow ranger Drizzt Do'Urden.
* "The Icewind Dale Trilogy": He wrote the novels "The Crystal Shard," "The Spine of the World," and "The Legacy" in this acclaimed trilogy.
* "The Dark Elf Trilogy": He contributed significantly to this series, which features the characters of Drizzt and his companions.
* "The Dungeon Master's Guide": He co-authored the 4th Edition of this essential guidebook for Dungeon Masters.
* "Mystara": He's also worked on the "Mystara" campaign setting, writing sourcebooks and adventures for this classic D&D world.
* "Other D&D Settings": Marshall has written for other D&D campaign settings, including "Planescape", "Ravenloft", and "Eberron".
Beyond D&D, he's also written:
* "The Adventures of Captain Nemo": He adapted Jules Verne's classic novel "20,000 Leagues Under the Sea" into a series of comic books.
His writing is characterized by immersive world-building, engaging storylines, and memorable characters. He's a respected voice in the fantasy genre, particularly within the realm of D&D.