This is a first edition, first printing copy of Troubled Blood, the fifth book in the Cormoran Strike Series published by Sphere in 2020. This along with the Cuckoos Calling are the two most valuable books in the overall series with Troubled Blood considered amongst collectors as the hardest book to find signed. The book is in fine condition, unread with a tight binding, the boards are square with sharp corners and without any colour fading. Internally, the pages are bright and clean with no inscriptions, marks or foxing of any kind. �Overall the book is in stunning condition aside from a horizontal crease to the lower spine of the book, most likely a binding error. The dust jacket is unclipped, without fading and in pristine condition protected in mylar. The book has J.K. Rowling's hologram adjacent to the title page which is signed in thick black sharpie by Robert Galbraith (J.K. Rowling). This is the style of pen it seems she used to sign the majority of this particular title. Adam Houston 'the Harry Potter Specialist' is the world's leading handwriting and signature expert for J.K. Rowling and it is his opinion that this is an authentic signature. This is an excellent copy in true collector's condition.