While more can definitely be said on this subject, I'd reccomend looking at this post by /u/thorspinkhammer in which they link to a list compiled by /u/Searocksandtrees, listing discussions in this sub having to do with 1491 (and its sequel 1493), although newer discussions may have occurred that are not part of this list. I'll quote the list itself here.
- it's our our sub's book list! https://www.reddit.com/r/AskHistorians/wiki/books/americas#wiki_general_na_history
Edit: I should mention that Charles Mann stands out amongst other non-historically-trained popular historians in that he makes a large effort to engage with experts in the field and familiarize himself with modern scholarship. He's effectively reporting on what historians are saying on the period, and this additional use of secondary sources helps avoid some of the problems that non-historians encounter when they just look at the primary sources, or if they rely to a singular secondary source without familiarization. I've seen Mann receive a fair amount of praise in this sub for his commitment to tracking scholarly works rather than making unsubstantiated (but titillating) claims.