A: Primarily, yes. However, Muslims from other schools (Hanafi, Maliki, Hanbali) can benefit from the hadith authenticity checks, but they should follow their own Madhab for the final ruling.
Do not let the search for a free PDF delay your learning. Search for a clean, OCR-scanned from a trusted Islamic library website. But plan to buy the printed version from Darul Fikr or Maktabah al-Bushra when you have the means. nuzhatul muttaqin pdf