Sita 'Squishy' Taylor is a cheeky, sneaky 11-year-old who lives with her dad and step-family in a very crowded apartment. Luckily for Squishy, their building is huge - and there's always plenty of mysteries to investigate! Like... * How long would it take to cycle to a space station? * Why does red cordial make everyone more fun? * How come you can't hug over the internet? * Why is there a renegade astronaut on the roof?