Submerged book is available internationally and South Africa as a paperback and ebook.

Amazon.com Kindle edition
Amazon.com Paperback edition
Amazon.co.uk Kindle edition
Amazon.co.uk Paperback edition 
In South Africa (useful to compare prices)


Takealot.com Paperback edition
Exclusive Books Paperback online store
Exclusive Books stores in South Africa and Botswana

Loot.co.za Paperback edition
Readers Warehouse Paperback edition