The Baby-Sitters Club Wiki
The Baby-Sitters Club Wiki

Claudia and the Lighthouse Ghost is the 27th book in The Baby-Sitters Club Mystery series.

Back Cover Summary[]

When the Hatts, old family friends of the Kishis, come to stay at Claudia's house, things get pretty cramped and tempers flare. The Hatts own the old Stoneybrook Lighthouse, which has lately been the site of some spooky occurrences. Someone — or something — wants the Hatts to leave town...or else.

Gradually, a tragic story emerges — a tale involving a death, the lighthouse, and the Hatts. The Baby-sitters suspect that someone tied to this dark event is behind the new troubles. But can they figure out who, and why, before somebody gets hurt?


The Hatts are close family friends of the Kishis, and they're coming to stay in Stoneybrook for a while. Mr. Hatt, the dad of Laura, Steve, and Caryn, owns an old, run-down lighthouse, and he needs to do something about it. The Hatts are planning to renovate it, and how exactly are they going to? The Kishis are going to help them.

Claudia, Laura, Steve, and Caryn are looking around the lighthouse one evening when they witness a small quarrel between Mr. Hatt and another man named Mr. Langley.

A few days later, during a BSC meeting, everything seems fine — until Janine screams. Everyone rushes downstairs to find her holding a baseball cap with a piece of paper that says 'Hatts go home' attached to it. The letters seem to have been magazine cutouts.

Mr. Hatt needs some more help, and hires the BSC members. Stacey and Mary Anne are the first ones on the job and discover that someone has graffiti'd the side of the lighthouse with the words HATTS OFF! Meanwhile, Jessi and Mallory do some research at the library and find out that a 16-year-old boy named Adrien Langley had died in the waters near the lighthouse nine years ago.

Time skip to a few days later, when the BSC works together at the lighthouse to help Mr. Hatt and solve the mystery. They find Mr. Langley and question him, and he tells them that they 'didn't read all the articles' and that Mr. Hatt allegedly locked the lighthouse up with Adrien still inside. Adrien had severe claustrophobia and couldn't stand to spend the night in the lighthouse, so he jumped.


The BSC plans a viewing party for the Veehoff Comet which is set to come in orbit.

Characters in this book[]

Claudia's Family

BSC Members





Places in this book[]

Pop Culture and Real-Life References[]

  • I Love Lucy reference on page 1
  • Madame Curie
  • Virginia Woolf
  • Einstein
  • Mozart
  • Richard Feynman
  • Albert Eretz
  • Doris Lessing
  • Galileo
  • The Fox (folk song)
  • Cape Cod potato chips
  • Halley's comet

Continuity and Inconsistencies[]



  • The Kishis have a five bedroom house in Good-bye Stacey, Good-bye, yet in this book there's only four rooms.
  • Claudia points out that Stacey is the only blond in the BSC, however she forgot to mention Shannon.


  • Claudia used to think algebra was a type of lingerie.
  • Sometimes Janine regrets her relationship with Jerry.
  • Jobs arranged but not seen: Mary Anne for the Arnold twins.
  • Claudia knows that Ben and Jerry's factory is in Vermont.
  • Claudia narrates that Abby is a better athlete then Kristy.
  • Mary Anne couldn't watch Disney cartoons as a kid.
  • The BSC hosts a meeting in the bathroom when Janine is using Claudia's room.
  • This is the first time we learn the birth order of the Pike Triplets.
  • This is one of the few times where a member of the BSC visits the high school.


Mystery Books
#1 Stacey and the Missing Ring | #2 Beware, Dawn! | #3 Mallory and the Ghost Cat | #4 Kristy and the Missing Child | #5 Mary Anne and the Secret in the Attic | #6 The Mystery at Claudia's House | #7 Dawn and the Disappearing Dogs | #8 Jessi and the Jewel Thieves | #9 Kristy and the Haunted Mansion | #10 Stacey and the Mystery Money | #11 Claudia and the Mystery at the Museum | #12 Dawn and the Surfer Ghost | #13 Mary Anne and the Library Mystery | #14 Stacey and the Mystery at the Mall | #15 Kristy and the Vampires | #16 Claudia and the Clue in the Photograph | #17 Dawn and the Halloween Mystery | #18 Stacey and the Mystery at the Empty House | #19 Kristy and the Missing Fortune | #20 Mary Anne and the Zoo Mystery | #21 Claudia and the Recipe for Danger | #22 Stacey and the Haunted Masquerade | #23 Abby and the Secret Society | #24 Mary Anne and the Silent Witness | #25 Kristy and the Middle School Vandal | #26 Dawn Schafer, Undercover Baby-sitter | #27 Claudia and the Lighthouse Ghost | #28 Abby and the Mystery Baby | #29 Stacey and the Fashion Victim | #30 Kristy and the Mystery Train | #31 Mary Anne and the Music Box Secret | #32 Claudia and the Mystery in the Painting | #33 Stacey and the Stolen Hearts | #34 Mary Anne and the Haunted Bookstore | #35 Abby and the Notorious Neighbor | #36 Kristy and the Cat Burglar
Super Mysteries
#1 Baby-sitters' Haunted House | #2 Baby-sitters Beware | #3 Baby-sitters' Fright Night | #4 Baby-sitters' Christmas Chiller
Other Series
Baby-Sitters Club | Super Special | Portrait Collection | Readers' Request | Baby-sitters Club: Friends Forever | California Diaries | Baby-Sitters Little Sister | The Kids in Ms. Colman's Class