The hieroglyphs script was only deciphered in 1822 by Jean Francois Champollion. That is 23 years of hard work after the Rosetta Stone was found in 1799.
There is no detailed biography of Champollion in English. The best available is The Keys of Egypt- the Race to Read the Hieroglyphs by Lesley and Roy Adkins ©2000.
This book contains the diary and letters written by Champollion when he visited Egypt’s antiquities from May 1828 to March 1830. A fascinating diary.