Apparently, 'Chindi' is part of a series of books all set in the same universe by McDevitt, but this is the first book I've read by this author. A wealthy group devoted to the search for extraterrestrial civilizations gets an experienced pilot assigned to their mission. Although they're widely regarded as being a bunch of kooks, the mission is more successful than anticipated: a network of broadcasting satellites is discovered, all circling planets which have signs of now-dead civilizations - and they lead to a mysterious, gigantic alien spacecraft which seems to be an unmanned craft, creating a museum of alien civilizations.
The book is written reasonably entertainingly - in that it's got decent characterization, a constant flow of mystery, romance, action, and a near-constant death toll, but the problem was that I kept waiting for the big revelation that was going to reveal why all these alien civilizations seemed so remarkably and unbelievably HUMAN - I mean, one place they find is a near-exact simulacrum of a 19th-century European sitting room, just a little bit bigger - and no one even thinks that that is odd. But nothing of the sort ever came up in the book, and all I can attribute it to is a remarkable lack of imagination in describing possible alien cultures.