What If You Had An Animal Home!? (What If You Had... ?) (미국판)

What If You Had T. Rex Teeth? And Other Dinosaur Parts (What If You Had... ?) (미국판)

What If? (10th Anniversary Edition) (미국판)

Could You Ever 시리즈 페이퍼백 3종 세트 (미국판)

Could You Ever Dine with Dinosaurs!? (미국판)

Could You Ever Waddle with Penguins!? (미국판)

Could You Ever Dive With Dolphins!? (미국판)

What If You Had Animal Ears? (What If You Had... ?) (미국판)

What If You Had Animal Feet? (What If You Had... ?) (미국판)

What If You Had Animal Teeth? (What If You Had... ?) (미국판)

What if You Had Animal Hair? (What If You Had... ?) (미국판)

Horrible Science 페이퍼백 6종 세트 (영국판)

What If You Had Animal Scales!?: Or other animal coats? (What If You Had... ?) (미국판)

What If You Had An Animal Tail? (What If You Had... ?) (미국판)

What If You Had Animal Eyes? (What If You Had... ?) (미국판)

What If?: Serious Scientific Answers to Absurd Hypothetical Questions (영국판)

위험한 과학책 시리즈 페이퍼백 3종 세트 (영미혼합)

What If? 2 (미국판)

How To Absurd Scientific Advice for Common Real-World Problems (미국판)

What If You Could Sniff Like a Shark?: Explore the Superpowers of Ocean Animals (What If You Had... ?) (미국판)

Usborne Lift-the-Flap Questions and Answers About Our World (영국판)

My Big Book of Questions About the World (영국판)

Totally Random Questions #5: 101 Incredible and Intriguing Q&As (미국판)

Totally Random Questions #2: 101 Odd and Awesome Q&As (미국판)

Totally Random Questions #1: 101 Wild and Weird Q&As (미국판)