Flintstones Little Golden Book (lost book)

The flintstones  Little Golden Book came out in 1964, just before the series of the same name aired aired. It features Fred and Wilma Flintstones and their young son Junior. Junior never actually appeared in the series, he was eliminated as a character, and when the Flintstones actually did have a child, the child was made a girl, Pebbles, for marketing reasons.

Synopsis
As best l can determine, the story involved a day at the beach with the Flintstones and possibly the Rubbles. Junior evidently got up to some mischief that was the start of the book's storyline.