It sounds to me like you have a very workable plan.
Each LLATL year has a focus on 4 book studies. However the excerpts through out the book are from many books. We do all 4 book studies. I have found that the books are not long or hard for my children. I believe for the orange book the first one is the boxcar children. My daughter read this in about two days, my son took about a week. However because we school with the CM way, my children are reading in many areas and have plenty of challenging books going.
But I think your “1 or 2” idea is just fine! They give you alternatives in the book and summarize up the stories for you. These are very easy to skip.
I am not looking at any of my books, but my daughter just finished up the green one (7th grade) and I believe her research took 2 weeks.
Again, just keep to your time and know that it’s ok if it takes you longer then the time they allot. Small bites are good, especially when you know they understand, then big bites and totally losing them.
Need to get the family up for church.
Blessings,
Vanessa