Start with high-confidence intermediate algebra books, then narrow by subgenre or adjacent topics.
Challenging Problems in Algebra
Alfred S. Posamentier, Charles T. Salkind
Algebra I Workbook for Dummies
Mary Jane Sterling
Algebra II Workbook for Dummies
Algebra II for Dummies
Algebra II All-in-one for Dummies
Mcgraw-hill Education Algebra II Review and Workbook
Christopher Monahan
