Mobius موبيوس

Beginner

Div, Grad, Curl, and All That H. M. Schey

Easy

Vector Analysis (Schaum's Outline) Murray Spiegel A Student's Guide to Vectors and Tensors Daniel Fleisch

Medium

Vector Calculus Marsden & Tromba

Hard

Geometrical Methods of Mathematical Physics Bernard Schutz

Extreme

Geometry, Topology and Physics Mikio Nakahara