Millburn residents haven’t stopped reading just because it’s summer.

The library has been busy with patrons coming in for books, CDs, DVDs and library programs. While the weather is hot outside, readers can cool off inside.

But some books are so hot, that the library staff says they can’t keep them on the shelves, according to reference librarian Barry Devlin.

Devlin said the wait time varies from book to book, though the staff bought more copies of 50 Shades of Grey and The Litigators to better meet the demand of requests by patrons. Still, there are up to 20 patrons still waiting for some of these titles.

 “I usually wait till there is not as long a list and take my time [with a book],” said Devlin. “There are so many other great books to read at the library.”

Though a book may only be checked out for a couple of weeks, Devlin pointed out that anyone with a Millburn Library card may download a few select books for free through the library’s system.

So here’s this summer’s hot reading list:

1. 50 Shades of Grey by E.L. James

The adults-only romance novel is the first installment of a trilogy chronicling an affair between a young, obsessive writer and a wealthy but controlling and emotionally wounded entrepreneur. The two struggle to reconcile their mutual admiration with seemingly incompatible flaws. 

2. Backfire by Catherin Coulter

This FBI mystery/thriller, set in San Francisco, centers around the trial of a couple accused of committing a string of murders. The plot thickens when, after becoming suspicious that the prosecution has been threatened, the trial’s judge turns up dead with a bullet in his back

3. Fallen Angel by Daniel Silva

Bestselling author Daniel Silva has struck gold again with this international murder mystery. This book covers all the bases from murder to espionage to scandal to romance, extremism and the constant, looming threat of World War III.

4. A Clash of Kings by George R.R. Martin

Thr second book in the fantasy series A Song of Ice and Fire. Its prequel is the basis for seasons one and two of the hit HBO series Game of Thrones.

5. Abraham Lincoln: Vampire Hunter by Seth Grahame-Smith

This book finds one of America’s greatest leaders smiting bloodsuckers with a silver axe all in the name of vengeance. Taken from his “secret journal” and written in biographical style, Honest Abe’s quest leads him all the way to the White House, where he preserves the Union from cessation and defends in from the creatures of the night seeking to destroy it.

6. The Litigators by John Grisham

Two dodgy lawyers from southwest Chicago see a chance at their big break when they hire a boozy young attorney and attempt to jump on a massive class action lawsuit against a pharmaceutical company. The sleazy litigators see dollar signs, but they won’t come easy in this humorous legal thriller.