"Very well, young ladies," he said.  "I will investigate this matter.  And if I need to speak with you again, I know where to find you..."

Letting his voice trail off in what Trixie decided was his "threatening" manner, Marcel Patou turned away abruptly and strode to his car.  As he pulled open the door, he stumbled over a root and leaned heavily on the steering wheel.  The horn blared loudly for a second or two before he managed to regain his balance and pull himself inside.  He drove off, with a corner of his trench coat sticking out of the door and dragging along the road.

Trixie burst out laughing as he disappeared around the curve.

The Mystery of the Antique Doll (p. 145-146)

Title :
Trixie Belden and the Mystery of the Antique Doll

Author :
Kathryn Kenny
The ghost writer of this book is unknown.

First Published :
1984

Chapter Titles :
1.  The Doctor's Request
2.  Trixie and Honey Help Out
3.  The Curious Antique Shop
4.  Trixie Investigates
5.  An Unusual Favour
6.  The Parisian Doll
7.  A Suspicious Stranger
8.  Wrongly Accused
9.  The Clue in the Dress
10. Caught!
11. Trixie's Plan
12. No Escape
13. The Rescuers
14. The Sergeant's Commendation

Setting :
Sleepyside, New York; Paris, France and New York City.

Synopsis :
Trixie and Honey jump at the chance to assist an injured neighbour and explore the new antique store next door, but they find the manager knows little about antiques and Trixie is immediately suspicious.  An invitation to spend the weekend in Paris with the Wheelers, has both girls excited and the manager of the store asks them to bring back an antique doll as a favour.  Trixie and Honey agree and deliver the doll on their return, but when it goes missing they are accused of stealing it.  A mischievous dog brings the doll close to home and Trixie makes a startling discovery.  With the help of a bumbling French Inspector of Police, the Bob-Whites find themselves in hot water with seemingly no way out.

Characters : 
Trixie Belden
Jim Frayne - adopted son of the Wheeler's
Honey Wheeler - Trixie's best friend
Brian Belden - Trixie's eldest brother
Mart Belden - Trixie's "almost twin" brother
Helen Belden - Trixie's mother
Peter Belden - Trixie's father
Bobby Belden - Trixie's six year old brother
Diana Lynch - a Bob-White and neighbour
Dan Mangan - a Bob-White and Regan's nephew
Matthew Wheeler - Honey's father
Madeleine Wheeler - Honey's mother
Sergeant Wendell Molinson - head of the Sleepyside police
Bob Murphy - Mr Wheeler's pilot
Dr Lawrence Ferris - a Sleepyside doctor
Mrs De Keyser - an injured neighbour that Trixie and Honey help after school
Carl Reid - manager of The Antique Barn
Charles - taxi driver in Paris
Inspector Marcel Patou - from the French Special Police investigating the counterfeit ring

Villains :
Carl Reid and his accomplices - part of an international counterfeit ring.  They held the Bob-Whites hostage while they printed money.

Points of Interest:
Mart asks if Honey and Trixie are going to the newspaper staff meeting (p. 11) and later gives them their assignments.  However, in #29 The Mystery of the Velvet Gown, Trixie is told that freshman aren't allowed to work on the school paper.

It is late fall, the first week of November and Trixie remarks that Halloween was only last week (p. 26), but Brian hasn't gotten any older.

Mrs De Keyser lives on Glen Rd and Trixie and Honey get off the school bus there, on the way home from school.  It is within walking distance of their houses.

Jim wouldn't be going to Paris with Trixie and Honey because of the big basketball game on the weekend (p. 65).

Honey calls her mother "mom" several times while they are in Paris (p. 81) and it sounds really strange.

Trixie and Honey were competing in the Eastern Regional Spelling Contest that was held at the Sheraton Hotel in New York City (p. 102).

The French Inspector of Police seems to be based on the bumbling Inspector Clouseau.

Trixie tells the Bob-Whites that Mr Stratton asked her to finishing washing the beakers after chemistry (p. 108).  Mr Stratton is the school principal, but it appears he also teaches chemisty.

Molinson is very arrogant when he rescues the Bob-Whites and talks down to Trixie more than usual (p. 172-174).

Trixie comes into the clubhouse late after basketball practice (p. 184).