Amazon has the following free kindle books for free.
https://smile.amazon.com/gp/product/B071ZBDTXZ?ref=em_1p_2_ti&ref_=pe_3730140_564197560
https://smile.amazon.com/gp/product/B07654CFFQ?ref=em_1p_3_ti&ref_=pe_3730140_564197560
Amazon has the following free kindle books for free.
https://smile.amazon.com/gp/product/B071ZBDTXZ?ref=em_1p_2_ti&ref_=pe_3730140_564197560
https://smile.amazon.com/gp/product/B07654CFFQ?ref=em_1p_3_ti&ref_=pe_3730140_564197560