I have found several errors in this book involving both grammatical/typeset errors as well as miscalculations or numbers that appear out of thin air in a few of the solution answers within this book. I am currently studying for the FE exam, and I have two graduate physicists that I have been studying with and asking for peer review and they both agree that there are errors within the solutions section for these practice problems.It is somewhat jarring that the author of the book is repetitive, informal and uses denotations that are simply just out of the ordinary. I don’t think I have ever seen in my entire career "Feet Per Second" being denoted as fps, instead of f/s. The author’s informality within the solutions sections, feels like you're talking to your uncle who just so happens to have taken a physics course. To some degree, it is understandable as the author is trying to instruct you throughout the book. However, I have never had solution manuals trying to have a conversation with me which just feels awkward. You are looking for solutions and explanations, yet it just feels like the author is speaking to you from over your shoulder in the way that he authored the book. Reviewing several of the problems, the author’s explanations are not entirely straightforward either. They often do not show a good step by step when calculating with equations and sometimes just pull numbers out of thin air when clearly there should be a process that shows where the number came from.For example, on one of the problems on page 109 the author is showing the readers how to calculate reaction force Ay using a balanced equation with two KNOWN values and one calculated value. The calculated value By = 148kN and the two known values are -10kN and (-18kN/m) *(5m) = 90kN. In the equation it reads: Ay + 148kN - 10kN - 95kN = 0. The author clearly either made a typo or miscalculated a KNOWN VALUE with his input of -95kN on this example, otherwise this 95 number just came up out of thin air. While this is one of the small errors which is generally forgivable or at least something that you can easily discern what had happened, there are other problems where there are errors early on in the equation and it throws off the entire solution which has several steps or multiple calculations.Other problems have similar issues to the -95kN but for more like problem 16 on page 99 which is shown in my photos, where the author again calculates a number (-1825) the uses a DIFFERENT number (-9125) as well as typographical errors showing a double negative in his equation:Energy (Point B) = 10,370 ft lbs - -9125 ft lbs = 1,245 ft lbsThere was so much going wrong in this one equation alone, first that the author did not use the number he calculated specifically for this equation on the line before it, second that they subtracted a negative number from a positive number and somehow wound up with a LOWER number than the base value, and third, there was no explanation at all whatsoever on how the equation is structured nor where the 9125 number came from, it just simply states, "there will be negative friction force." There is no instruction saying something like "subtract the friction force from the total energy" which arguably should be intuitive, but the combination of this issue and the numbers popping up out of thin air, makes it incomprehensible.Overall, the exam book is helpful with how it prepares you to take the exam regardless of the informal writing and the typos/errors in the solutions. You can always overlook typos and can always outsource or even peer review solutions. The author has a decent section at the beginning of the book that is supposed to motivate you, which was nice and honestly quite motivational, but the writing was repetitive and felt less like instruction, and more like word vomit with the author trying to convey his ideas. I think the author should stick to engineering, as writing is simply not his strong suit, but then again, with the errors in the solutions, who can tell. Generally speaking, you get what you pay for with how cheap this book is compared to all the other exam practice books, just know that in this case, its grammatical errors, typos, and solution errors, otherwise it is still a pretty useful book.