Kate Sedley 
Wheel of Fate [EPUB ebook] 

In fifteenth-century London, the child-king is not the only one under threat — 1483. Amidst the chaos following the death of King Edward IV, Roger the Chapman is called to London to investigate a threat to the Godslove family. In the past year, there have been two deaths and a mysterious poisoning. Roger dismisses their worries at first but, when another member of the family disappears, he stumbles across a shocking secret that threatens to destroy the entire Godslove family . . .