Alguém tinha uma pergunta semelhante aqui e a resposta foi:
I think this is a series by Don Whittington. Some of the titles are: Vampire Mom, Werewolf Tonight, Spookhouse, Dark Charm, Freak Show, Zombie Queen, and Ghost Ship. They were mostly published in 1995 – 6
Isso parece estar correto. Um comentário da Amazon de um dos livros menciona "Broccoli" e Winston e outro menciona que eles são semelhantes a Goosebumps:
This book was my favorite. This book was very exciting and suspenseful. I really got to know Broccoli and especially Winston. I also thought Ben Franklin was very humorous and fun. After a long day, this was a good book to come home and relax by a fire with. I loved this book.
This series of books are wonderful reads for young children. As the publisher of the audio books (no longer available), I got to know them intimately...and I loved them. There exciting, fun, and scary. If you read to your children, you'll enjoy them as much as they do. These are easily as good as R.L. Steins Goosebmup series.
Esta é a descrição do Navio fantasma na Amazon:
Winston and Brock encounter a supernatural schooner commanded by the Flying Dutchman and his crew, and they set sail with the Dutch Captain en route to the Bermuda Triangle to do battle against the ancient ones.
Aparentemente, o nome real de "Broccoli" é Brock Lee, ou algo parecido e recebeu o apelido de "brócolis".