Any Unadapted Material in Latin For Americans?

In my journey through Latin, I’ve picked up the 2007 edition of these three textbooks. But nowhere in them do I find a statement as to how much editing was done of material by classical authors.

LFA Book 2 focuses on D.B.G., but I’ve noticed in the first few selections of Caesar’s Book I there has been some light editing: short phrases removed, some words removed, etc., in order to make the selections easier. These don’t seem too serious to me. I’ve only looked at Book I, but I’m wondering how far into LFA this editing goes, i.e., when or if editing stops.

LFA Book 2 then moves on the Pliny’s letters and some miscellaneous literature. LFA Book 3 focuses on Cicero. In some readers, such as Roma Aeterna, the reader is told how much adaptation is done and when unadapted Latin is given.

My question is: Does anyone know how much editing was done on the material in LFA Books 2 and 3? At what point in Book 2 is the Latin unadapted? I haven’t checked anything in Book 3, but is that all unadapted? It would be nice to know.