Free from the author via KDP Select @
Amazon:
Margo by Jerry B. Jenkins, who IIRC is one half of the "Left Behind" series writing team, from which we've gotten at least two volumes of such previously as official publisher promo freebies (I kind of wonder if they'll repeat one for the release of the new film, which incidentally has garnered a
surprising celebrity endorsement on its official Facebook page). This is 1st in his Margo Mysteries series of inspirational romantic detective suspenses, this installment originally out from Moody Books' Jeremy Press imprint in 1979, if I'm deciphering the linked paperbacks correctly.
NB: If you want all 13 of these things, apparently Jenkins has put together an omnibus edition
via Smashwords and thence to Kobo where it should be couponable.
The first of thirteen books in the Margo Mysteries series. These suspenseful stories of mystery, romance and intrigue have become favorites of hundreds of thousands of loyal readers . Follow the relationship of Philip and Margo, who meet as young adults in crisis and grow in love with each other and with God as they begin their careers as private detectives.