Another great one is 'The Moonstone'. It's often considered one of the first detective novels in the English language. It has a captivating story centered around a precious diamond, with a great deal of intrigue, multiple narrators, and a brilliant exploration of human nature.
One characteristic is his vivid characterizations. The characters in his mystery novels are well - developed, each with their own motives and secrets. This adds depth to the mystery as the reader tries to figure out who is trustworthy and who has something to hide.
Armadale is a great choice too. It's a bit less well - known than the other two but is no less good. The relationships between the characters are complex and the overall atmosphere of the novel is quite unique, with elements of mystery and drama all intertwined.
His detective novels usually have a strong sense of mystery. The settings play an important role in enhancing this mystery. Take 'The Woman in White' for instance. The spooky and isolated locations add to the overall air of enigma. Also, Collins is good at using different narrative voices, which makes the story more engaging as the readers get different perspectives on the mystery.
In 'The Moonstone', one of the main characters is Rachel Verinder. She is central to the mystery as the owner of the precious Moonstone which goes missing.