Few free with kindle unlimited or discounted to $0.99 via US/UK (Use US/UKVPN)
$0.99 Agile Project Management: The PMI-ACP Certification Course
$0.99 Decision-making and Problem-solving for Business
$0.99 Working with Difficult People
$0.99 Business Planning: Preparing a Business Plan. Performing Key Analyses. Preparing for Implementation.