People often ask me what the difference is between the book by Nesbit and the similar one by Lamb. Here’s my opinion: Both are great; but Nesbit is a bit easier read for younger children.
For a comparison example, here is the opening from A Midsummer Night’s Dream in each:
Nesbit — “Hermia and Lysander were lovers; but Hermia’s father wished her to marry another man, named Demetrius. Now, in Athens, where they lived, there was a wicked law, by which any girl who refused to marry according to her father’s wishes, might be put to death.”
Lamb — “There was a law in the city of Athens, which gave to its citizens the power of compelling their daughters to marry whomsoever they pleased: for upon a daughter’s refusing to marry the man her father had chosen to be her husband, the father was empowered by this law to cause her to be put to death.”