Some simple and easily readable (with a growing difficulty) Epitomes were written for schools in the 19th century in France.
As an example, I own a copy of the Epitome Historæ Græcæ by Lantoine (written for 11 year old pupils). First pages are easy to understand, and the difficulty grow little by little. There is a simple lexicon at the end.
Of course, there are different difficulties. The well-known De viris illustribus by Abbot Lhomond can also be used to learn Latin.