My suggestion would be to look whether there's a publicly available syllabus for a finance degree and start with book from courses' reading lists. Generally sp

My suggestion would be to look whether there's a publicly available syllabus for a finance degree and start with book from courses' reading lists. Generally speaking, I find that there are finance and economics textbooks which are quite accessible. Start, for example, with Berk & DeMarzo's "Corporate Finance". You could also look at the books for the CFA level 1 exam. The CFA is a widely recognized professional certification and I find the reading materials for Level 1 quite accessible.