St. Alphonsus Maria de Liguori’s ‘The Eucharist’ is here.
St. Peter Julian Eymard has also written a great deal on the subject. I believe the Eymard series are still for sale in paperback.
I loved reading "Seven Secrets of the Eucharist" by Vinny Flynn. It was easy to read, but extremely powerful. Also, check out Pope John Paul II’s Encyclical “Ecclesia de Eucharistia” which can be read online here. Both of these works will gave you a greater appreciation for this tremendous gift.
There are MANY excellent articles here:
And this book, The Hidden Manna:
I heard that “Seven Secrets of the Eucharist” by Vinny Flynn is a great book.
The Lamb’s Supper by Scott Hahn is also very very good.