So, by all means, find the PDF. Use it as a check. But treat each problem as a riddle to be solved before you peek. When you finally derive the Lorentz transformation on your own, you will not need a PDF. You will have become the solution.
Looking for a complete, reliable is a common milestone for physics students mastering undergraduate-level mechanics. Published originally in 1968, Robert Resnick’s textbook remains one of the most elegant, pedagogically sound introductions to Einstein's theory. So, by all means, find the PDF
Robert Resnick Introduction to Special Relativity Solution PDF: A Complete Study Guide by all means