Camilla Isley has a freebie right now:
Love Connection, which Kindle says is the fourth in her First Comes Love series, but Kobo says is book 0.5 in that series. So maybe it's a prequel? I haven't read this book, but have read and enjoyed a couple of her other books. The ones I've read are light-hearted rom-coms.
Kindle US:
https://www.amazon.com/dp/B01LXO39NU
Kindle UK:
https://www.amazon.co.uk/dp/B01LXO39NU
And not free at Kobo, as least as of now...