Elemental Truth

Elemental Truth is the third and final book of the Mysterious Fields series trilogy - and this trilogy should be read in order, starting with Enchanted Net.   When Elemental Truth opens in October of 1889, Thessaly Lytton-Powell has gone through tremendous changes in her life. One looming fear is gone, but that doesn't mean she's free to live her life as she wishes - or with who she wishes. Vitus Deschamps is establishing himself as a talisman maker. Somehow, they need to navigate a maze of complex choices if they're going to make a life together.   (You can find summaries of Enchanted Net and [Silent Circuit] on their pages).  

Notable people

Thessaly Lytton-Powell (main)
Vitus Deschamps (main)
  It also features various members of the
Fortier & Landry families including:

Henut Landry
Chrodechildis Fortier, Dowager Lady Fortier
Lord Clovis and Lady Maylis Fortier
Their son, Sigbert
Dagobert and Laudine Fortier
Their son, Garin   Along with Cyrus Smythe-Clive and various Council Members.  

Places

Bryn Glas (in northern Wales), Arundel (Sussex), Trellech, Dinas Emrys, various private homes.
A silhouetted man and woman in Victorian dress waltz hand in hand on a golden damask background bordered by pipes and gears with a streak of lightning behind them. A jeweled ring is set in the top left.