The Genesis of Elvis by Bart van Eikema Hommes, originally issued in Dutch in 2016, is now translated into English and available at Amazon.
This is what Amazon says about it:
This biography aims to uncover Elvis’s cultural roots and identify the sources he drew from on the path to his world-changing sound. The musical history surrounding the pop icon is excessive and this book takes an analytical approach to try and shed some light on Elvis’s world. Where did he live and which churches and schools did he attend with his friends? Which artists and radio stations influenced him at an impressionable age? Where did he perform in the early days and first commit his voice to the eternal grooves of vinyl? All these questions and more must be asked to begin to understand Presley’s sound and it’s invaluable influence on Rock and Roll. As John Lennon once put it: “Before Elvis there was nothing!”