I don't know of any novel named Xiao Li's Slippery childhood. It might be a common name, but I'm not sure. If you can provide more context or description, I will try my best to provide you with a more accurate answer.
Not necessarily. The term 'founder' can apply to both real-life individuals whose stories are documented as non-fiction and fictional characters created within a fictional narrative.
Backlash can be either fiction or non-fiction depending on the specific content and context. Sometimes it's a fictional story, while other times it might be based on real events.
In 'The Slippery Slope' full novel, it probably has the Baudelaire orphans facing new challenges. There could be more revelations about the secrets of the V.F.D. The setting might be as gloomy as in other parts of the series, with the orphans constantly trying to outwit the villains while also dealing with moral dilemmas.
Maybe it's related to a particular event or experience where something or someone became slippery when wet. For example, a sports game played in rainy conditions that led to unexpected challenges and outcomes.