Is this the original 1870 text or a modern retelling?

It is an unchanged reprint of the original 1870 edition, not a modern retelling or abridgment.

Does it include notes, an introduction or an index?

No. The publisher describes it as an unchanged reprint, so expect the original text without modern editorial additions.

Who is this book for?

Readers who want a firsthand period account: Civil War and prison-camp history fans, genealogists and students working with primary sources.

How does it compare with modern Civil War memoirs?

Modern editions usually add introductions, annotations and indexes. This one gives you the raw original instead, which is better for research and worse for casual reading.

Is the print quality good?

It is described as a high-quality reprint of a rare historical work. Quality depends on the source copy, so expect occasional imperfections typical of reprinted old books.