Margaret ThomasKey example -- in addition to following #UABookBans and #ALALibrary, I have kept up with #HornBook and #SLJ and assorted of their blogs for well over a decade now, all via Twitter. Same with various #NewZealand and #USA authors, publishers, etc. Recreating that community in a centralized way is proving difficult.
Daniel Bellingradt 
En passant, if you fancy hornbooks, this painting from 1670 features two of them, as you can see highlighted. Hornbooks often displayed letters of the alphabet and were an educational tool in early modern schools. As novice readers you were often trained with hornbooks, a form of an ABC book that consisted of a piece of parchment or paper pasted on a wooden board protected by a leaf of horn. Before you unnecessarily wasted or damaged paper, you had to train with a #hornbook. #BookHistory
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