So, about writing a series. I once found a post on the Dreame academy website asking when you can turn a book into a series.
Personally, for me I would write a sequel only if the character has enough weight.
For this book, for example, Roman Landon suddenly came alive during that reunion diner, and I knew that I had no other choice than to write his story as well. In addition, the other Landon brothers were equally charismatic and exploitable, but I never envisaged of turning it into such a Sicilian drama!!!
One more important tip is that you have to be consistent with you characters. Their traits and personality have to be consistent throughout the books...Example, if the hero pinches his nose whenever he's angry...this might seem like a small detail to you but it's important to make h
