If you use the PDF, ensure it includes the Solutions Manual . Singer’s problems are excellent, but having the step-by-step solutions is vital for self-study and verifying your FBDs. Comparison: Singer vs. Hibbeler or Meriam
This article must address the elephant in the room. Ferdinand L. Singer passed away in 2010, but his works are likely still under copyright by HarperCollins (or subsequent publishers). If you use the PDF, ensure it includes the Solutions Manual
Before you risk a virus or a DMCA notice, try these options: If you use the PDF
Singer uses a specific convention for drawing force polygons that is different from Hibbeler. Learn his way. He uses a dotted line for resultants and a solid line for components. Master this, or you will get lost in the friction chapters. If you use the PDF, ensure it includes the Solutions Manual