Find a library that's not computerized and still uses a card catalog. Find the book you need, don't check it out but read it at the library and take notes.
Or, go to a used bookstore and find the book(s) you need and buy them along with a stack of random books. If they give you suspicious looks when they look for the price tag on the bomb making books, tell them you're an artist and it's for an art project where you're going to carve the cover and pages to make it look like the book is exploding and a bomb making book is the perfect title for such a project.
Or explain you'll tell them why you need it after they give you their home address. Then laugh maniacally.
Or look around, slide a $5 bill across the counter and ask if they'd kindly erase the security video footage after you leave.
Or shake nervously, look around the store and then whisper to the clerk, "I can't say anything. Russian hackers are everywhere!"
Most importantly, if you follow any of this advice and get in trouble, my name is John Doe.