Georgiev/Semkov: The Modern Englisch 1.c4 e5 Vol.2 CT Each chapter focuses on a

Each chapter focuses on a particular theme and features dozens of exercises

I'll second that

Those who still play with King's Gambit with either White or Black can still have plenty of fun playing many crazy variations

My Chess is not only about them

and engaging✔️ 10+ endgame themes

Georgiev/Semkov: The Modern Englisch 1.c4 e5 Vol.2 CT Each chapter focuses on aThis volume completes the coverage of the Modern English with a repertoire against 1 c5, 1 Nf6, and 1 e6. It is based on active fight for the centre by e3 and d4. It is written from White's standpoint, but it should also serve Black players since the authors often discuss several alternatives to the main lines. The book follows the acclaimed Chess Stars structure with three sections in each chapter Main Ideas, Step by Step, and Annotated Games.