Some reader reviews from Amazon.com, by way of agent Rachelle Gardner's blog:

To Kill a Mockingbird by Harper Lee:
“I don’t see why this book is so fabulous. I would give it a zero. I find no point in writing a book about segregation, there’s no way of making it into an enjoyable book. And yes I am totally against segregation.”

The Grapes of Wrath by John Steinbeck
“While the story did have a great moral to go along with it, it was about dirt! Dirt and migrating. Dirt and migrating and more dirt.”

The Great Gatsby by F. Scott Fitzgerald
“It grieves me deeply that we Americans should take as our classic a book that is no more than a lengthy description of the doings of fops.”

The Lion, The Witch and the Wardrobe by C.S. Lewis
“I bought these books to have something nice to read to my grandkids. I had to stop, however, because the books are nothing more than advertisements for “Turkish Delight,” a candy popular in the U.K. The whole point of buying books for my grandkids was to give them a break from advertising, and here (throughout) are ads for this “Turkish Delight”! How much money is this Mr. Lewis getting from the Cadbury’s chocolate company anyway? This man must be laughing to the bank.”

Lord of the Flies by William Golding
“I am obsessed with Survivor, so I thought it would be fun. WRONG!!! It is incredibly boring and disgusting. I was very much disturbed when I found young children killing each other. I think that anyone with a conscience would agree with me.”

The Lord of the Rings by J.R.R. Tolkien
“The book is not readable because of the overuse of adverbs.”

Mrs. Dalloway by Virginia Woolf
“The only good thing to say about this 'literary' drivel is that the person responsible, Virginia Woolf, has been dead for quite some time now. Let us pray to God she stays that way.”

And finally, EXACTLY what you want to hear from someone who is going to review your book:

Tropic of Cancer by Henry Miller
“This book is one of the worst books I have ever read. I got to about page 3-4.”