Good afternoon Bella. At least in my location.
It's quite nice isn't it? Kindle search actually works on the PC as well as the Mac. (Online as well I believe.) You're right, myself and some others quote extensively from it on the forum.
To search the entire Seth material via Kindle you would need to either know what book contained the information and own the book, or own every book and diligently search every book. You would also need to know the exact phrase used. Otherwise you would need to multiply the time spent scanning through Kindle's search results by every book and then again by every possible permutation of the phrase. This could easily occupy an entire evening and even then you might not find it. But at least thanks to Kindle it would not take months!
Often folks don't know what book a bit of information is in, or they don't own every book (but might want to purchase the one their information is in) or they would like to retrieve that information across the entire Seth material. Most often they don't know the precise phrase used, only the topic, but searching a single topic word would involve clicking on each result and reading a great deal of context, again multiply this time by every Seth book.
The search engine I would create would be:
Free, you wouldn't need to own any of the books. Excerpts would be limited so as not to dissuade purchase of the actual book (in fact it would encourage purchase) and to abide by U.S. copyright law (where myself and the server are located).
Public. Anyone in the world would have easy access with minimal barriers (no registration with Amazon/Kindle to login, purchase, and download the book before they could begin searching).
Comprehensive. It would search all published material.
Flexible. Exact phrases and spelling would be unnecessary. Proper pluralization ("dreams" vs. "dream") wouldn't be necessary.
Context aware. If you wanted to search for a paragraph or chapter that talked about both out of body projections and dreams you could do so - the words wouldn't need to be directly adjacent to each other.
Advanced. You could easily search for multiple phrases, like
"astral projection" OR "out of body experience", and you could combine this with the above context awareness:
"astral projection" OR "out of body experience" NEAR "dream".
I hope this more in-depth description ignites your excitement and sufficiently contrasts it to Kindle's existing search features.