Lehninger's Biochemistry or Principles of Biochemistry . These books are similar to Stryer, but a little more complex. A Problems Approach, Benjamin, 1st or 2nd edition. Lots of problems and their answers. A genetics text with thorough explanations and a problem solving emphasis.
Older editions are good but lack sections on molecular genetics.
Stansfield, Schuam's Outline of Theory and Problems of Genetics , McGraw Hill, 2nd or 3rd edition. A good source of solved genetics problems. More detailed than necessary but covers a lot of the topics in the course in manageable chunks. Highly recommended by many former students. Similar to Alberts, et.