I'm not very far into the book yet. I only read Part I Concerning God. Spinoza throws tons of definitions, propositions, correlations and Q.E.D.s at the reader. It's certainly not light reading and I've never read anything like that before but don't think it's too difficult to understand. I expected it to be way more complicated or confusing. In my opinion it's only very dry. The titels of the subsequent parts however sound rather promising and potentially relevant to Jeeves.