Danger Time is the 41st book in the Give Yourself Goosebumps series.
Plot
You enter a creepy-looking clock store called It's About Time at the mall. Chronos, the store owner, asks for your help in defusing a "time bomb" which, if it explodes, will stop time forever.
Story A
You choose to help Chronos, so you have to search for the bomb and destroy it before it goes off. But you face a number of dangers including the "Zodiacs", personifications of the various star signs.
Story B
You don't believe Chronos about the time bomb, so you run away from the store, but are then pursued by the sinister Time Police. You have to team up with Chronos, who is leading a rebellion against them; and you can choose to fight them in the past, present or future.