I understand you're looking for a solution manual for Fundamentos de Física by Frank J. (likely Frank J. Blatt, though the most common book with that title is by – or possibly you mean Frank J. Keller ? The most famous is Fundamentos de Física by Raymond A. Serway or Resnick/Halliday , but Frank J. Blatt wrote Fundamentos de Física for Spanish-speaking students).