Book 1: What Katy Did
1. The Letter
2. The Invitation
3. The Journey
4. The Arrival
5. The Introduction
6. The Excursion
7. The Picnic
8. The Accident
9. The Recovery
10. The Proposal
11. The Wedding
12. The Honeymoon
Book 2: What Katy Did Next
1. Home Again
2. The New House
3. The New Friends
4. The New School
5. The New Adventures
6. The New Love
7. The New Trials
8. The New Triumphs
9. The New Life
Book 3: What Katy Did at School
1. Back to School
2. Making New Friends
3. The Secret Society
4. The Athletic Team
5. The Class Play
6. The Big Debate
7. The Senior Prom
8. The Graduation
Book 4: What Katy Did on Vacation
1. The Trip to Europe
2. The Visit to London
3. The Tour of Paris
4. The Stay in Switzerland
5. The Cruise Down the Rhine
6. The Art Gallery in Florence
7. The Carnival in Venice
8. The End of the Vacation
Book 5: What Katy Did at the Seaside
1. The Arrival at the Seaside
2. The First Dip in the Ocean
3. The Picnic on the Beach
4. The Walk along the Cliffs
5. The Fishing Trip
6. The Storm
7. The Rescue
8. The Farewell to the Seaside
Book 6: What Katy Did in the Country
1. The Visit to the Country
2. The Walk in the Woods
3. The Boat Ride on the Lake
4. The Hay Ride
5. The Apple Cider
6. The Corn Roast
7. The Barn Dance
8. The Farewell to the Country
Book 7: What Katy Did at the Circus
1. The Arrival at the Circus
2. The Clown Show
3. The Tightrope Walker
4. The Strongman
5. The Animal Show
6. The Horseback Riding Act
7. The High Dive
8. The Farewell to the Circus
Book 8: What Katy Did at the Fair
1. The Arrival at the Fair
2. The Midway
3. The Ferris Wheel
4. The Cotton Candy
5. The Prize Animals
6. The Horse Races
7. The Fireworks
8. The Farewell to the Fair
Book 9: What Katy Did for Christmas
1. The Preparations for Christmas
2. The Decorating of the Tree
3. The Hanging of the Stockings
4. The Arrival of Santa Claus
5. The Opening of the Presents
6. The Christmas Dinner
7. The Christmas Carols
8. The Visit to the Church
Book 10: What Katy Did Next Year
1. The New Year
2. The New Resolutions
3. The New Adventures
4. The New Successes
5. The New Challenges
6. The New Friendships
7. The New Love
8. The New Life
Book 11: What Katy Did Forever
1. The End of an Era
2. The Beginning of a New Life
3. The Choices We Make
4. The Paths We Take
5. The Enduring Power of Love
6. The Legacy of Katy Carr