No, you may check out and buy books without having your book list investigated (without a warrant). Check with your local librayr how records are collected and how long they are kept: mine shreds/dumps all account records of checked out books a week after they have been returned.
According to the 'How the USA Patriot Act Helps Protect You And Your Family and Keep America Safe' website:
'As pursuant to USA Patriot Act section 2.38.972 subsection III.A.X., breathing is still mandated to take place only in private space at a rate of 20 breaths/minute standing or 40 breaths/minute exercising. Any deviation from this mandate provides sufficient evidence of terror conspiracy and investigation/arrest without a warrant is then justified. Mouth breathers and snorers are subject to indefinite confinement at Guantanamo Bay.
Thank you and have a nice day!'