Alphabet

Free to read here, from Project Gutenberg.

The History, Theory, and Practice of Illuminating

M. Digby Wyatt, Sir

A Apple Pie

Kate Greenaway

The Story of the Alphabet

Edward Clodd

An Alphabet of Old Friends

Walter Crane

The Tiny Picture Book

Anonymous

In the path of the alphabet

Frances Delavan Page Jermain, also an audiobook

The Story of the Alphabet

Otto F. Ege

Buchstabenmystik

Franz Dornseiff

German