Haeckel's Riddle of the Universe is a really good one. Much of the things evolutionists deny they ever said, especially about the anti-religious aspects of evolution, are condensed into one volume. It was very popular. Translated into many languages and sold hundreds of thousands or maybe millions of copies. Even Lenin read it. Also, I recommend the very important 1928 book Creation by Evolution. It is an authoritative collection of essays written by the creme-de-la-creme of evolutionary geniuses, with an introduction written by a eugenist Nobel laureate. It's simply a must-read, I think. No such number of such distinguished evolutionists have ever been assembled before for putting together "A Consensus of Present-Day Knowledge as Set Forth by Leading Authorities in Non-Technical Language that All May Understand."