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The Disappearance is the 18th book in The Hardy Boys Adventures series. It was first published in February 2019 by Simon & Schuster's Aladdin Paperbacks imprint.

Back cover summary

It's a case of hidden identities for brother detectives Frank and Joe in the in the eighteenth book in the thrilling Hardy Boys Adventures series.

The Hardy brothers and Frank's new girlfriend, Jones, are attending a local comic book convention on the shore. They meet up with Jones's friend Harper, a fellow comics super fan, on the boardwalk outside the convention. The four of them spend hours running from booth to booth and end the perfect day with pizza at Harper's short-term rental apartment.

Things don't stay so perfect, though. On the way home, Jones realizes she switched phones with Harper by accident and she is getting some really scary texts. When they show up at the apartment the next day, they find it totally destroyed and Harper is missing.

Frank and Joe start digging into their new friend's life, hoping to find out where she might have gone, but the more they find out about her, the more mysterious she becomes. Can Frank and Joe find this secretive character? Or has she disappeared forever?

Plot summary

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Notes

Prior to September 2018, this book was known as The Vanishing Room. However, beginning on September 4, 2018, many sites, such as Chapters.ca and Amazon.com started to show that the cover art for the book had been updated to include the title The Disappearance, and the Plot write-up had been changed to reflect a drastically different story.

The Vanishing Room's plot was as follows (as of June 2018):

It's a case of hidden identities for brother detectives Frank and Joe in the in the eighteenth book in the thrilling Hardy Boys Adventures series.

Ever since the Bayport Times article about their past cases came out, Frank and Joe have been getting calls for help in solving everything from lost keys to lost treasure. The boys can barely stand to answer their phones anymore. But when Principal Gerther calls, they pick up.

Turns out, Principal Gerther's cousin, Agatha, has noticed a string of strange disappearances in her apartment building. One person after another is entering the apartment next door...and they never come back out. Agatha would know, she never leaves her apartment!

Frank and Joe make some inquiries and realize each and every person that has stayed in apartment B3 has never returned home. What's worse—most of them have left a trail of debt or angry partners behind them. There are almost too many suspects to count!

Are these two teenage detectives up for the job? Or is The Hardy Boys reputation about to be tarnished?

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