What is the author's style in Jack and Jill by James Patterson?

The novel is written in simple English that uses very little slang or otherwise difficult to understand language. Cross is a cop, but he is also a psychologist; therefore, he is quite educated and his language reflects this. There are times in which Cross speaks with people whose speech is less educated; one time in particular he speaks to a drug dealer who speaks in slang, but this is not often. This novel also does not include much of the professional dialect often used in novels that include police procedure, again making it easier for the reader to understand the plot.