The MERM is the Lindbergh Mechanical Engineering Reference Manual.
This is a huge book since it covers all three ME exams and honestly has a lot of "fluff" (there's no calculus on the exam and there are other non-exam-relevant topics).
That being said I highly recommend this book for the following reasons:
It is a great way to learn about the principles of topics you forgot about from school
There are good practice problems with solutions in SI and US customary units
Personally I prefer learning from a physical hardcopy book with pencil + paper (maybe i am old school like that)
It's a great looking book and if/when you pass the exam, adds a bit of sophistication to your bookshelf.
DM me for additional info. Hell.. you might even get a little surprise ;)
PE exam review material might be the best one-stop shop for what you’re looking for. Something like this.
The MERM is also a really good one.
You want the Mechanical Engineering Reference Manual, by the same author. It’s currently 63% off, which is a killer deal!
Just buy the MERM.
You'll be able to reference it for nearly anything you come across.