I unlocked the "Thomas Jefferson's Library" badge in Serial Reader
https://www.serialreader.org/badge/56d9f51c51710179beeb4bc9/
Serial Reader for iOS and AndroidThomas Jefferson's LibraryCongress purchased Jefferson's library of 6,487 volumes in 1815 for $23,950. You've read a word for every book in that collection! Congrats!. From Serial Reader: Read classic books in daily bite-sized bits on iOS and Android.