Of The Lord of the Rings, W.H. Auden wrote, “I rarely remember a book about which I have had such violent arguments. Nobody seems to have a moderate opinion: either, like myself, people find it a masterpiece of its genre or they cannot abide it.”

Among the naysayers, Edmund Wilson wrote, “One is puzzled to know why the author should have supposed he was writing for adults. There are, to be sure, some details that are a little unpleasant for a children’s book, but except when he is being pedantic and also boring the adult reader, there is little in The Lord of the Rings over the head of a seven-year-old child.”

Tolkien seemed philosophical about the difference. He wrote in the foreword to the second edition:

The prime motive was the desire of a tale-teller to try his hand at a really long story that would hold the attention of readers, amuse them, delight them, and at times maybe excite them or deeply move them. As a guide I had only my own feelings for what is appealing or moving, and for many the guide was inevitably often at fault. Some who have read the book, or at any rate have reviewed it, have found it boring, absurd, or contemptible; and I have no cause to complain, since I have similar opinions of their works, or of the kinds of writing that they evidently prefer.

He wrote elsewhere:

The Lord of the Rings
is one of those things:
if you like it you do:
if you don’t, then you boo!