Jerry West: The Happy Hollisters

• Main characters: The Hollister family, consisting of five children (Pete, Pamela, Ricky, Holly, and Sue), and their parents (John and Elaine)
• Setting: The city of Shoreham (as far as I know, no state is ever mentioned)
• Bold type indicates a book I've read.

The Happy Hollisters is a series of books for children, published by the Stratemeyer Syndicate (also the publisher of the Nancy Drew and Hardy Boys series), between 1953 and 1969. The series was written by Andrew E. Svenson, using the pseudonym Jerry West, and was illustrated by Helen S. Hamilton. 

1. The Happy Hollisters  (1953)
   
2. The Happy Hollisters on a River Trip  (1953)
3. The Happy Hollisters at Sea Gull Beach  (1953) 
4. The Happy Hollisters and the Indian Treasure  (1953) 
5. The Happy Hollisters at Mystery Mountain  (1954) 
6. The Happy Hollisters at Snowflake Camp  (1954) 
   
7. The Happy Hollisters and the Trading Post Mystery  (1954) 
8. The Happy Hollisters at Circus Island  (1955) 
9. The Happy Hollisters and the Secret Fort  (1955) 
10. The Happy Hollisters and the Merry-Go-Round Mystery*  (1955) 
11. The Happy Hollisters at Pony Hill Farm*  (1956) 
12. The Happy Hollisters and the Old Clipper Ship  (1956) 
13. The Happy Hollisters at Lizard Cove  (1957) 
14. The Happy Hollisters and the Scarecrow Mystery  (1957) 
15. The Happy Hollisters and the Mystery of the Totem Faces  (1958) 
16. The Happy Hollisters and the Ice Carnival Mystery  (1958) 
17. The Happy Hollisters and the Mystery in Skyscraper City  (1959) 
18. The Happy Hollisters and the Mystery of the Little Mermaid  (1960) 
19. The Happy Hollisters and the Mystery at Missile Town  (1961) 
20. The Happy Hollisters and the Cowboy Mystery  (1961) 
21. The Happy Hollisters and the Haunted House Mystery  (1962) 
22. The Happy Hollisters and the Secret of the Lucky Coins  (1963) 
23. The Happy Hollisters and the Castle Rock Mystery  (1963) 
24. The Happy Hollisters and the Cuckoo Clock Mystery  (1963) 
25. The Happy Hollisters and the Swiss Echo Mystery  (1963) 
26. The Happy Hollisters and the Sea Turtle Mystery  (1964) 
27. The Happy Hollisters and the Punch and Judy Mystery  (1964) 
28. The Happy Hollisters and the Whistle Pig Mystery  (1964) 
29. The Happy Hollisters and the Ghost Horse Mystery  (1965) 
30. The Happy Hollisters and the Mystery of the Golden Witch  (1966) 
31. The Happy Hollisters and the Mystery of the Mexican Idol  (1967) 
32. The Happy Hollisters and the Monster Mystery  (1969) 
33. The Happy Hollisters and the Mystery of the Midnight Trolls  (1969) 

* Numbers 10 and 11 are sometimes switched in publication order, but Pony Hill Farm references their prior mystery about the Merry-Go-Round, so I'm listing Pony Hill Farm as #11.

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