In the Courts of the Sun - Brian D'Amato

Wonderful research, plodding storyline!
I believe that your personal politics will play a big part in whether you like this book or not. Conservatives will probably not like it and liberals probably will. As a moderate, the authors unrelenting desire to inject politics into a sci-fi/time travel/adventure was simply annoying.
In the world according to Mr. D'Amato, the United States, Caucasians, Mormons, the C.I.A., Corporations, Haliburton (ok, he got that one right) Tom Clancy, Alicia Keys and National Geographic are all bad.  

Famous Five - Book 15: Five On A Secret Trail

Camping again! This time the Five have pitched their tent near an old ruined cottage, which looks as though it's been abandoned for years. When Anne hears strange noises at night the others don't believe her...until they see ghostly lights. Could the cottage be haunted?

Famous Five - Book 14: Five Have Plenty Of Fun

George is not pleased when Berta, a spoilt American girl, turns up at Kirrin Cottage in the middle of the night dressed in disguise! But George hasn't got time to be jealous. Berta is in hiding from kidnappers, and she needs help. The Famous Five must risk danger to help out this stranger.

The Famous Five - Book 13: Five Go To Mystery Moor

Mystery Moor is aptly named, as the Five discover! There's something dangerous out there, but gang need help to find out what it is. The travellers camped on the moor are unfriendly, so the Famous Five have no other choice but to risk the treacherous mists and follow the trail.

Famous Five - Book 12: Five Go Down To The Sea

Who would deliberately lure somebody on to treacherous rocks on the Cornish coast? Somebody is flashing lights from the old tower on stormy nights—and the Famous Five sense danger. But can they solve this mystery safely?