[hfpop]

Thanks for the feed-back.

I tried now a few nonsensical searches. It takes three minutes for each search, with 2000 books and 35 collections, from the collections home page. The /system/Search Indexes folder has two files, index.db (1.9 MB) and index.lg (8 bytes). If a search returns nonempty results, then it does this, as you say, very fast indeed.