Schweser gets you 90% of the way there. That last 10% (the official CFA mocks) is what pushes you from "almost passed" to the top 10% of scorers.
The CFA Institute official textbooks weigh roughly 15 pounds and span 3,000+ pages. Reading them cover-to-cover is like trying to drink that firehose. kaplan schweser cfa level 1
However, treat Schweser as your , not the destination. Use it to learn the concepts quickly, but validate your knowledge with the official CFA Institute materials in the final stretch. Schweser gets you 90% of the way there