Golems wait silently in dungeon corridors, ready to apprehend unwary adventurers who dare defile their former master's sanctum. Shield guardians follow their owners faithfully, interposing themselves between the holder of their amulet and anything that would bring him harm. Homonculi fly forth, powered by their creator's lifeblood into a grotesque mockery of life. All of these are constructs, artificial life forms brought into the world by rituals long secreted away in the corners of occult libraries, in the ruins of mighty magical empires and the personal notes of spellcasters with the curiosity to explore this field of arcane lore.
Having traveled from 5e back through the annals of history, to the "perfect" version of D&D in my humble opinion, these books, this whole collection in fact, is a must-have! They breathe new life, and provide lore and rules aplenty for the avaricious, and omnivorous DM to utilize and format to his will. You will find plenty of goodies and "Rule of Cool" style play within the pages of these supplementary tomes of lore.