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USA Today combines all its bestselling books into one list and denotes which books sold best in which formats. The following is a list of the books that sold best as e-books.

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PositionTitleAuthorPublisherE-Book List PriceAgency Pricing?Notes

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2Fifty Shades DarkerE. L. JamesRandom House / Knopf Doubleday$9.99yes

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611th HourJames PattersonHachette / Little, Brown$14.99yes

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8City of Lost SoulsCassandra ClareSimon & Schuster$9.99yesYA

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13The InnocentDavid BaldacciHachette / Grand Central$12.99yes

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14Fifty Shades Trilogy [bundle]E. L. JamesRandom House / Knopf Doubleday$29.99yes

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15The WitnessNora RobertsPenguin / Putnam$12.99yes

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17InsurgentVeronica RothHarperCollins / Katherine Tegen$9.99yesYA

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20In One PersonJohn IrvingSimon & Schuster$14.99yes

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21On the IslandTracey Garvis-Gravesself-published$2.99yeshttp://paidcontent.org/2012/04/27/bestselling-e-books-april/

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23The Marriage BargainJennifer ProbstEntangled$2.99yeshttp://paidcontent.org/2012/05/04/e-book-bestsellers-marriage-bargain-jennifer-probst/

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25A Game of ThronesGeorge R.R. MartinRandom House$8.99yes

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28The Sins of the FatherJeffrey ArcherMacmillan / St. Martin's$12.99yes

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33Guilty WivesJames PattersonHachette / Little, Brown$12.99yes

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34Heat WaveRichard CastleHyperion$14.99nofree in Kindle Owners' Lending Library