I am very grateful to the technical reviewers—Steve Bearman, Taha Hachana, Marcin Juraszek, and Rohit Pathak—whose meticulous reviews proved invaluable in improving the quality of this book. Thank you for your diligence and your help throughout the process. Thanks to the excellent team at Packt Publishing. I would also like to thank the technical editor, Parag Topre, and the content development editor, Rahul Nair, who worked with me and kept this project on track to publish this book. Your assistance as an editor and reviewer along with your comments were invaluable in ensuring that this book was a comprehensive and reliable source of information on F# and functional programming.

Thanks to Don Syme and Microsoft Research, without whom neither F# nor this book would have been possible, and to the excellent F# community that provides plenty of resources. It has been my privilege to work closely with Jeff Bergman (Google), who got me started on F# and functional programming. I am forever grateful to Stephen Soong, for his unwavering support and feedback, and David Lazar, who allowed me to run seemingly crazy ideas by him. I am indebted to all my friends and colleagues, including Nicolas Naaman, David Gullett, Calvin Park, Teresa Watkins, Raja Peer, Dave Banta, Ajit Kumar, Dr. Jevdet Rexhepi, Paul Watson, Dr. John Dean, Kamran Masood, Jim Java, Muhammad Mansoor, Antony Chhan, Rashid Kamran, Jeff Cox, Mobeen Minai, Rob Walling, and Kamran Zameer, to name a few, for reading the early drafts and providing feedback and encouragement. And last but not least, special thanks to my family for their support and to my kids, Zakariya and Ali; without their shenanigans, this book would have been finished 6 months earlier. Love you guys!