Technically, no. Aurelio Baldor died in 1978. Under international copyright law (Berne Convention), works enter the public domain 70 years after the author’s death. That would be 2048. Until then, the rights belong to his estate and the publisher.
: Over 7,000 exercises and problems updated to reflect modern life contexts.
Full-color illustrations and clearer typography compared to the classic "yellow and red" versions.
