There are other versions of this book, too. Thanks for sharing what you think may help. We appreciate you, and welcome to MHI. Come back whenever 🫂❤️ https://www.amazon.com/Right-Speak-Working-Voice/dp/0878300554/ref=nodl_?dplnkId=cf4003fa-3cb5-42ac-9352-18a64db178ea
I thoroughly agree with /u/lilwoodzey2013 comment, I'd also recommend The Right to Speak by Patsy Rodenburg. It helped me immensely with my voice projection. The right way of breathing can change your voice incredibly, get a voice coach or get into singing.