SAP Financial Accounting (FI) Certification which you can find details at C_TFIN52_64, requires mostly SAP Academy Materials of TFIN50 and TFIN52. Around ~%90 of 80 certification questions are asked from these materials. You can see the competency areas per topics at C_TFIN52_64 page again.
Studying TFIN50 & TFIN52 books deeply, line by line is advised. However revising your studies before certification exam is also essential. At this stage, the documents I share below becomes very handful with jotted down important points per topic from both TFIN50 & TFIN52 books.
Summary notes of TFIN20 & TFIN22 for SAP MAnagement Accounting (CO) Certification Exam (C_TFIN22_64) can also be found HERE