Ok, so I'm writing an urban fantasy/paranormal romance. The prologue is written in first person. The majority of the book is written in third person with the exception of character thoughts or telepathy with is written in first person in italic text. For a particular scene in the book which is a rather long one, possibly even an entire chapter, I want to switch to first person. Is there a hard fast rule against this? Looking for opinions and advice. I typically prefer third person but first person puts the reader in the shoes of the character which is my aim for this sequence. First person can be useful because characters can be so unreliable.