I'm about to finish "Confession of a Buddhist Atheist" by Stephen Batchelor. It challenges most standard Buddhist beliefs. It will make you think.

If you have a comfortable world view based on Buddhism which gives you peace, you might not want to read this unless you want
that peace and comfort challenged. However, here on the Dharma Overground I don't think that will be a problem. Most people here probably look forward to having their unquestioned assumptions questioned.