I have previously mentioned my favourite author and book: Shibumi by Trevanian (Rob Whitaker).
Whitaker's daughter Alexandra is also an author. Here is a link to her website.
Alexandra collaborated with Trevanian on his last 2 books: Incident at Twenty-Mile and Crazy Ladies of Pearl Street.
The really good news is that she is going to complete his unfinished work: Street of the Four Winds.
The only bad news (as a Trevanian fan) is that she seems to be working on another novel ("set in Spain") in the interim.
Hopefully we will see SOTFW before too long.