A Murderous Procession — Ariana Franklin

AKA 'The Assasin's Prayer' (British title)

Adelia Aguilar is back in this thrilling fourth installment of the Mistress of the Art of Death series.
In 1176, King Henry II the King of England has called upon his Mistress of the Art of Death - anatomist and doctor Adelia Aguilar - to accompany ten-year-old Princess Joanna on her thousand-mile journey to marry the king of Sicily. They must take with them the legendary sword Excalibur.
And so Adelia sets sail with the golden princess, and her lavish party of nobles, musicians, servants, laundresses, grooms, luggage and treasure. But when members of the procession begin to die, and it looks as though Adelia is to blame, there are dangerous accusations of witchcraft.
Meanwhile, one traveller, armed with a brilliant disguise and a personal vendetta, has been watching Adelia all too closely. This secret assasin wants her dead, but he wants her to suffer first...