These are the ones I used, a very long time ago:
Engineering Fundamentals - Newnan & Larock (EIT exam)
Mechanical Engineering License Review - Pefley & Newnan
Mechanical Engineering Review Manual - Lindeburg
Professional Engineering Examinations Vols 1&2 - NCEE
I'll give you a tip - I don't know if it's still relevant:
If you take a combined exam - (Covers electrical, mechanical, chemical, civil) - that means there are a lot of fluid mechanics questions to choose from - so study that especially.
But things could have changed since then.