After crime writer Robert B. Parker died in 2010, his estate hired several writers to continue the multiple series Parker wrote in his lifetime.
I’ve read six of the Spenser novels by Ace Atkins. They’re enjoyable but frustrating, like seeing a cover band of your favorite group. Beatlemania rather than the Beatles.
A good writer will occasionally surprise you—write something completely unlike them. But a writer hired to write like someone else will, if they do a good job, never surprise you. They always write just like the writer they’ve been hired to write like.
I don’t mean to be harsh on Atkins. He was hired to do a job and he did it well. And I’ve put one of his original books on my to-be-read list.