Lily & Cassie By the Sea Mystery Books in Order

Lily and Cassie hope for a fresh start in a seaside mansion, only to encounter ghost stories and rumors of pirate treasure. Two unresolved mysteries draw them into an investigation that becomes increasingly dangerous inside their new home.

Lily, Cassie and two fellow amateur sleuths board a steam train for a theatrical weekend. Strange accidents disrupt the entertainment, forcing the four women to investigate whether a ghostly prank or deliberate sabotage threatens their journey.

Lily and Cassie's preparations for a Halloween maze are disrupted by unsettling incidents. When a body appears on opening night, the mother and daughter investigate hidden secrets before another death turns the town's festivities into tragedy.

A murder shortly before Christmas makes Lily and Cassie suspects and sends them searching for the real killer. Assisted by a pirate's ghost and their cat, they unravel secrets while trying to avoid becoming the next victims.

A vacation in Bar Harbor turns dangerous when Lily and Cassie encounter a murder linked to missing artifacts and pirate history. With their ghostly companion Ri, they follow clues toward a lost treasure before the killer strikes again.

Lily and Cassie seek a pirate's journal in Savannah, but a ghost complicates their search. When a man connected to their supernatural companions is accused of murder, they return home to unravel the journal's secrets and clear him.

Disturbing personal news draws Cassie into a search for answers, only for her intended contact to turn up dead. With Lily and their ghostly friend Ri, she investigates buried truths while someone works to silence them.

Seeking help to break Nate’s curse, Lily and Cassie visit a remote Maine mansion. Murder interrupts their search, forcing them and their ghostly companion Ri to untangle family secrets before the killer strikes once again.

Hoping to recover from family turmoil, Lily and Cassie join a scenic train excursion to a mountain mansion. A violent storm traps the guests, and a murder forces them to identify the killer before anyone else dies.