Disappointed by Tim Powers' Novel Declare

I finally had to abandon Tim Powers' supernatural spy novel, Declare. I read over 200 pages into it and just couldn't go any further. I really enjoyed Powers' earlier novel, The Anubis Gates, and I had high hopes for Declare after reading reviews. But the book didn't evoke any emotional reaction from me at all. I never really connected with Hale, the main character, and I didn't care for the way Powers' narrator alternated back and forth between the 1940s and the 1960s. I think part of the problem was my unfamiliarity with many of the historical references in the book. If the characters or the story would have captivated me more, I would have done a little research into the history, but it just wasn't worth the time. As a point of comparison, when I began reading Patrick O'Brian's Master and Commander series, I only had a surface knowledge of nautical terms and Napleonic history, but I was so interested in Jack Aubrey and Stephen Maturin that I bought companion books to help me understand the story better. I had no such desire with Declare. I was intrigued by the religious elements in the book, but not enough to keep reading. Fans of spy novels may have better luck with it than I did. Disappointing.