What is the author's style in Enigma by Robert Harris?

The language of the novel is very formal. It is written in proper, British English. The language is not without rules as the author writes in a grammatically perfect way. The sentences follow grammar rules and complex rules of literature. There is not much slang, except for a few British expressions such as "old love." Technical language dominates the novel. It is technical language surrounding cryptology and espionage. The author breaks down the concepts for an average reader, so s/he can understand everything. The cryptology language can become dense at times, but dialogue breaks up the density.