1. It depends on your liking and passion for novels. If you love something then the enthusiasm and interest with which you would read would be more and hence would benefit you.
2.As you choose novels, cultivate the habit of reading with increasing speed and then scanning. Over a period of time you will reach a stage wherein you will not read every word of the sentence but will get the meaning of it quickly.
3.There are many novels that are page turners and difficult to put it down. There are also collection of short stories that can used by beginners.Also make a quick note of interesting words and phrases that are new and enhance the quality of your writing.
4.For instance, there is a book by Jeffery Archer - A prisoner of Birth. In this two people of excellent human qualities are compared. The author describes them wonderfully with elegance - 'both are the same oaks but planted in different forests, each a prisoner of birth in his own sense'. I still remember this because I was impressed by this author.
5.If you like crime dramas, I would suggest
The Complete collection of Sherlock Holmes - Sir Authur Conan Doyle.
The Alex cross series by James Patterson.
6.If you like court room dramas and legal battles,
then choose John Grisham series, he's the master story spinner in this class.
7.If you like religious mysteries then you can choose
Dan Brown series of books.
8.For medical mysteries and fiction you can try
Robin Cook and Eric Segal books.
9.If you are into the occult and dark novels, then try reading Dean Koontz
10.If you like raw justice and eye for an eye type of hero, the please read
The Jack Reacher series by Lee Child, you'll love it
11.The list would be endless, I would suggest, make a list of the best sellers of a few authors, start reading them and the list from above are all excellent works from authors who have a good command of the language and use many words and phrases that will be useful in broadening one's vocabulary.