Odds on Miss Seeton is the fifth Miss Seeton book, and, per SYKM, the last one written by Heron Carvic. It has dropped to $0.99 at Kindle and Kobo US, and it’s discountable at Kobo…where discount coupon “Partners22” still works for 40% off on one book per checkout…
Buy Odds on Miss Seeton at Kindle US | Kobo US
And I also noticed a couple of other Carvic/Seeton books semi-long-term at $0.99 as well
Picture Miss Seeton, #1
Buy at Kindle US | Kobo US
Miss Seeton Sings, #4
Buy at Kindle US | not on sale at Kobo US, at least as of now
And if you like these, the rest of the series, at least the ones published by Farrago, is reasonably priced at $2.99 each at Kindle US, and mostly $2.99 to $3.99 at Kobo US (and also discountable). Just click on the series link buttons on any of the webpages linked to above.