Mistakes that happen most often in cover design are messy layouts, text that is difficult to read, lack of contrast in colors, and not considering the expectations of the genre. Besides, lots of writers still depend on templates a lot without making any changes to them. A proper use of an online book cover maker will require you to be somewhat creative, yet, at the same time, to give a clear message that will make your title noticeable and professional-looking across different formats.