Lang's Algebra book before revisions contained famously difficult exercises https://mathoverflow.net/a/10899 https://mathoverflow.net/a/10899 but I liked Basic

Lang's Algebra book before revisions contained famously difficult exercises https://mathoverflow.net/a/10899 https://mathoverflow.net/a/10899 but I liked Basic Mathematics even if it's out of print (expensive) and full of errata issues.