Who was Al-Jahiz?

[The Sardar]

Salam/Peace dear siblings of Mankind and Allah (SWTAY) bless you all 

I have a question about Al-Jahiz's position. I have seeing claims that Al-Jahiz was a critic which i thought was very interesting. However i had a hard time finding any information on his criticism of hadith, the only one i found was Ignacio Sanchez scribd document but i can only read few pages because of the trial version:


https://www.scribd.com/document/326642601/Ignacio-Sanchez-Al-jahiz-and-Hadith-Criticism

I wonder if there is some documentation of Al-Jahiz's critique of Hadith transmission and it's colllection.