What a delightful and specific request!
At one point, they stumbled upon a group of Maxwell's equations creatures, who were struggling to find their way. Alex used his knowledge of the equations to help them find their missing pieces, and in return, they gifted him with a magical compass that always pointed to the underlying physics of any situation.
As he pored over his trusty textbook, "Física" by Tipler and Mosca (6th edition, volume 2, of course!), Alex began to feel a strange sensation. The pages started to rustle and turn on their own, and before he knew it, he was sucked into the world of physics itself.