Jeppesen designed its Multi Engine Manual to be the clearest, most complete resource available for learning the ins & outs of multi-engine flying. This easy-to-read text features copious use of full-color illustrations and photos that facilitate comprehension of multi-engine aerodynamics, performance data, engine-out operations, and every other area necessary to safely serve as a multi-engine PIC. Also includes sections detailing the latest in human factors and aeronautical decision making. This all-inclusive assembly of aeronautical knowledge, complete with detailed presentations of all multi-engine flight maneuvers, is the ultimate resource for learning to fly twins.
As a MEI (Multi-Engine Instructor), I can say it's a really good book.
Jeppesen Multi Engine Manual
Excellent manual for new learners. It is very detailed, colorful and covers all of the important aspects of learning to fly a ME airplane.
Jepp Multi-Engine Textbook
Excellent reference for during the MEL course and beyond. Diagrams and pictures are well-done and help to explain concepts. I liked the real-world sidebars throughout. Pricey (hence the 4 rating) but worth it.