If you want to find only some torn pages, then just open the books randomly until you find... some torn pages.
If you have to do actual real work, and you really have to find all torn pages, then your only chance is to go one-by-one carefully and inspecting them all.
A trick which is actually quite impossible to implement in real life, is to turn always exactly two pages / sheets. Since a tear would be visible from both sides of the sheet, you do not need to see ever tear twice. But actually always turning exactly 2 sheets every time is just a nice dream in the real world. For a computer algorithm, things would be very simple. But electronic books usually do not have torn pages.
Note: You have to remember that restoration work is usually a highly professional, highly skilled work. Speed is usually not a factor - actually, it is a counter factor. The faster the work is done, the lower the quality, and the higher the chance of destruction, rather than restoration.
A possible trick (not lifehack): if you do not want to turn all those 30 x 1'500 = 45'000 pages, then let someone else do it. Rather than doing it faster, do not do it at all.
Another note: if the books are old (you did not mention anything about it) or in any way damaged (water, mold, fire / heat), and the sheets of paper are brittle-ish, then even the technique of turning the pages matters, not only the speed.
Later edit
If you are into DIY-ing too, you can attempt to build a machine to turn the pages for you.
Principle 1: blowing air. Use a compressor, direct the air jet to the edge of the pages. Adjust distance, angle and air flow to get the desired result. Risk: it might turn too may pages at once and you will miss some defects to be repaired. Difficulty level: quite easy.
Principle 2: vacuum. Use a compressor to create vacuum. The pages will be "sucked" by a moving arm, which has a circular oscillating movement around the binding side of the pages. Sucking stops when the page is turned, and starts again when a new page needs to be "grabbed". Risk: you might damage the pages if the machine is not properly adjusted. You can test it with some non-expensive books first. Level of difficulty: quite advanced. Source of inspiration: the Google's book scanner (I saw a video on the net many years ago). It emulates the turning of the pages done by a human. I expect that it can be done almost without electronics (let alone software, micro-controllers...) - just with some switches and valves for controlling the air flow / suction.
Poor-man's alternative for the compressor in both cases: a hairdrier, after you disconnected the heating elements first.
