Smith's novels are The Retreat and Follow Me Down.
At The Strand Magazine she tagged six thrillers that feature toxic perfectionism, including:
NINE PERFECT STRANGERS by Liane MoriartyRead about the other entries on the list.
Like my own book, Nine Perfect Strangers is set on a luxurious wellness retreat. Each person is there to lose weight, deal with past trauma and generally undergo a spiritual transformation. The woman running the retreat, Masha, was once an over-stressed, over-worked corporate devotee until she suffered a heart-attack. Following her brush with death, Masha transforms herself and becomes a wellness extremist. She sets on a mission to help others achieve their ‘best’ selves by opening her retreat, but she quickly becomes obsessive and delusional to the detriment of her guests.
--Marshal Zeringue