Vibration Problems in Engineering is a great reference book for the mechanical engineer. The print readability is not as good as modern textbooks but it contains all of the same information with real application and then some (which isn’t always found in modern textbooks).
It contains many specialized problems and takes an “old world” approach to problem solving. This book helped me (entry level engineer) take a different perspective of real world engineering. It is also very similar to J.P. Den Hartog’s Mechanical Vibrations.