When I teach Grade 2 one of my students favorite thing to do is to read Magic Tree House novels. They are the first novels I introduce and they are so proud of finally being able to read a novel.
The great thing about Magic Tree House novels is they are predictable and follow the same literacy patterns. This makes is comfortable for students to explore the text.
There are so many different novels in the series providing great opportunities to compare the adventure of Jack and Annie. Here is a free book comparison printable for you.