The mystery deepens this week as the brother-and-sister team of Shane, 13, and Portia, 11, try to find out how to help old Mr. Blair. Last week he received a package containing a clock. To read the mystery so far go to and click on "Summer Book Club." This week more than 50 KidsPost readers entered.

"What do you need us to do?" asked Shane.

But before Mr. Blair could answer, the lights went out and the children heard a scream. When the lights came back on, Mr. Blair was gone. All that could be heard was the ticking of the clock.

-- Nicholas Taylor, 9, New Market, Maryland

What has happened to Mr. Blair? What should Shane and Portia do now? Who screamed? What's the deal with the clock? Find out next Wednesday when KidsPost publishes the fifth installment of the reader-written mystery. What happens next is up to you!

Here are the rules: Your submission can be no more than 50 words. (Yes, "the" counts as a word!) We can edit your entry. The deadline is 9 a.m. Monday. You can enter by e-mailing (put "Mystery" in the subject line) or by faxing us at 202-496-3780. To be considered, an entry must include your name, age, address and phone number. If we publish your entry, we'll send you a KidsPost T-shirt.