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Billy and the Boingers Bootleg is the fifth collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1987.

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Bloom County Babylon: Five Years of Basic Naughtiness is the fourth collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1986.

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Goodnight Opus (ISBN 978-0-316-10853-9) is a 1993 children's book by Berkeley Breathed featuring Opus the Penguin.

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The Last Basselope is a children's book by Berkeley Breathed published in 1992. The 32 page story depicts Breathed's Outland characters, led by Opus the Penguin, hunting the last remaining specimen of a purportedly fierce beast called a Basselope. Once found, the beast—named Rosebud—turns out to be friendly and harmless.

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Loose Tails is the first collection of the comic strip series Bloom County by Berkeley Breathed. It was published by Little, Brown and Company in 1983. At least two different editions exist; the contents and front cover art are identical but later editions swapped out the serious author biography on the back cover for a parody one.

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The Night of the Mary Kay Commandos is the seventh collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1989.

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Penguin Dreams and Stranger Things is the third collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1985.

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Tales Too Ticklish to Tell is the sixth collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1988. The cover image, of Opus sitting on the lap of George H. W. Bush, is a parody of the infamous photo of Donna Rice and Gary Hart from May 1987.

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Toons for Our Times is the second collection of the comic strip series Bloom County by Berkeley Breathed. It was published in 1984.

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A Wish for Wings That Work: An Opus Christmas Story is a children's book by Berkeley Breathed that was published in 1991. It was made into an animated television special that same year. The book and special feature characters from Breathed's comic strips Bloom County and Outland.