Gareth Jones' "Elementary Number Theory" has received mixed reviews, with some users noting that it omits crucial steps in proofs, making it less suitable for beginners. In contrast, Vanden Eynden's book is frequently recommended by number theorists, although its price point of over $50 has been criticized as expensive, despite some finding it available for around $30. Users have also mentioned the effectiveness of Underwood Dudley's book, which provided clarity on key concepts like quadratic reciprocity. A recent user who acquired Vanden Eynden's book expressed satisfaction with its content, feeling well-prepared for further study in number theory. Overall, Vanden Eynden's text is gaining traction as a solid introduction to the subject.