The books of Paula Brackston
Paula's book are doing extremely well in America, but have not yet got the attention they deserve here. There is a new series starting next year, involving time travel. Extremely exciting.
I am reading a lot of 'old' books, written in the 19th and 20th centuries. One surprising discovery has been Louis L'Amour - which makes my friends laugh. Very well-written Westerns, which appear to get historical facts quite accurately woven into his stories. Another is Stuart Cloete, who does the same thing for South Africa. I can recommend them both.
I think Helen Fitzgerald is brilliant.
And, to my shame, I find there are still quite a lot of Agatha Christies I've not yet read - and am hugely enjoying every new one I try.