Wanted-A Bride is #125 in the Pink Collection and was published in February 2015. It's the story of Lord Templeton, who is being sent to calm a potential international problem in Siam. He takes Amina, the secretary's niece, as his pretend wife and they find many adventures on their travels.
The cover looks like a reprint of a US publication, but I don't think I have a copy. If you find one on another BC book, let me know.