Collecting Sabuda's work is tricky because 'best' really depends on what you're after. For sheer spectacle and a centerpiece item, 'The Wonderful Wizard of Oz' is unbeatable. The moving parts are insane, like the twister that literally twists up from the page. It's his most famous for a reason. But I find 'The Night Before Christmas' more charming as a gift. It's smaller, more intimate, and the snowy, white-on-white engineering is delicate magic.
For a collector, you can't ignore the paper engineering bible, 'Encyclopedia Prehistorica: Dinosaurs'. The pop-ups within pop-ups showcase his technical mastery. It's a conversation starter. Honestly, the 'Alice's Adventures in Wonderland' one feels a bit fragile for frequent handling, so I'd keep that for an adult collector who appreciates the art over a kid who wants to interact. The 'Winter's Tale' is less known but stunning for its quiet, icy beauty.
My contrarian take? The 'Cookie Count' pop-up book is underrated for gifting to families. It's sturdy, interactive with pull-tabs, and less intimidating than the massive dinosaur tome. For a true collector, hunting down signed editions or the limited-run 'The Movable Book of Mr. Rabbit' is the real endgame, but those prices are no joke.