Which games allow or require you to hold your DS system sideways like a book?

I've got a problem.

OK, so I've got lots of problems--especially when it comes to this lovely little hobby of mine that some folks refer to as "gaming."

Only one of those problems is relevant to this particular blog post, though, and that would be that I'm currently kind of obsessed with games that allow or even require you to hold your DS system sideways (like a book) while playing them.

The thing is, I can't think of many DS games that fit this description. Obviously Hotel Dusk is one of them, as is its sequel, Last Window.

Aside from that wonderful pair of visual novels, though, the only examples that come to mind are Square Enix's intriguing Sigma Harmonics, Rhythm Tengoku Gold (Rhythm Heaven in North America and Rhythm Paradise in Europe) and the Brain Age games.

Do you fine folks know of any other DS carts that let or force people to play them "book-style"? If so, I'd really appreciate it if you'd share their names in the comments section below.

See also: 'Nice Package! (Last Window: The Secret of Cape West, Nintendo DS)'

I'm going to miss playing games this way

All of this 3DS talk has me wondering: Are the days of playing games while holding (insert dual-screened system of choice) sideways--a la Brain Age, CrossworDS, Hotel Dusk: Room 215 and Rhythm Heaven--over?

Sure, the soon-to-be-released 3DS has two screens, just like its predecessor, but one of those screens is larger than the other. Plus, the larger one will be used (predominantly) to display 3D imagery--which reportedly won't be visible when the system is turned sideways.

All of the above has me thinking most 3DS games will be single-screen affairs--as in, most, if not all, of the action will take place on the larger, upper screen, while secondary information (maps, menus, etc.) will reside on the smaller, lower screen.

I'm sure that setup will be fine in most situations, but I can't help but feel a bit sad that the days of "book style" games may be behind us.