Can you recommend a good book for a 2nd grader with a 6th grade reading level?

Good historical novels such as those based on real people with some license taken such as (The last Grand Duchess)-and she wears a white dress on the cover! There are several on this Resurgent theme!-also Curse of the Romanovs which has some Science Fiction and occult overtones, For some reason there hasn"t been a good speculative fiction novel on Amelia Earhart but as a film is coming out on her soon, maybe there will soon be! Give History a chance, Comrades! To kill a mocking bird (It has touchy subjects in it like racism) Harry tutledove