From the folks at Reading Group Guides. Go to here on their site to fill out the entry form as they describe in the quote posted below:

“We’re giving 100 readers the chance to win a copy of #1 New York Times bestselling author Neil Gaiman‘s THE OCEAN AT THE END OF THE LANE — available in paperback June 3rd — a stirring, terrifying and elegiac fable about a man who returns to his childhood home and discovers an unremembered past of danger, sacrifice and love. Winners will be asked to read the book and come up with 3-5 questions for Mr. Gaiman by Thursday, July 31st. To enter, please fill out this form by Friday, June 20th at noon ET.”