Here are links to 13 Blackmar-Diemer Gambit books:
Blackmar-Diemer Tactics has 500 combinations and checkmates (2020)
Blackmar-Diemer Gambit Keybook II (1999)
Blackmar-Diemer Games 1 (2016)
Blackmar-Diemer Games 2 (2016)
Blackmar-Diemer Theory 3 (2016)
Blackmar-Diemer Theory 4 (2017)
These four books in one volume are:
Blackmar-Diemer Series (2017)
Blackmar-Diemer Puzzles (2017)
Blackmar-Diemer Games 5 (2017)
Blackmar-Diemer Playbook 6 (2017)
Blackmar-Diemer Playbook 7 (2017)
These four books in one volume are
Blackmar-Diemer Series II (2017)
These four books in one volume are:
Blackmar-Diemer Series (2017)
Blackmar-Diemer Puzzles (2017)
Blackmar-Diemer Games 5 (2017)
Blackmar-Diemer Playbook 6 (2017)
Blackmar-Diemer Playbook 7 (2017)
These four books in one volume are
Blackmar-Diemer Series II (2017)
Blackmar-Diemer Games 8 with 182 BDG games.
Below is a List of Variations covered in my BDG books.
BDG Avoided: 1.d4
1.d4 c5 etc.
1.d4 e5
1.d4 Nc6 2.e4
1.d4 Nf6 2.f3 c5 etc.
1.d4 e5
1.d4 Nc6 2.e4
1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.Bg5 etc.
1.d4 f5 2.e4 fxe4 3.Nc3 Nf6 4.f31.d4 Nf6 2.f3 c5 etc.
1.d4 Nf6 2.f3 d5 3.e4
1.d4 Nf6 2.Nc3 c5 3.d5
1.d4 Nf6 2.Nc3 c5 3.d5
BDG Avoided: 1.d4 d5
2.e4 c5 etc.
2.e4 c6 3.f3 etc.
2.e4 e6 3.Be3 Nf6 etc.
2.e4 e6 3.Be3 dxe4
2.e4 e6 3.Be3 Nf6 etc.
2.e4 e6 3.Be3 dxe4
BDG Avoided: 1.d4 d5 2.e4 dxe4
3.Nc3 Bf5 etc.
Now for the starting position for the Blackmar-Diemer Gambit:
BDG Declined: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6
4.f3 c5 etc.
4.f3 e6 5.Bg5
4.f3 e6 5.fxe4
4.f3 e3 5.Bxe3 g6 etc.
4.f3 e3 5.Bxe3 e6
4.f3 e3 5.Bxe3 Bf5
4.f3 c6 5.Bc4
4.f3 c6 5.fxe4
4.f3 c6 5.Nxe4
4.f3 Bf5 5.g4 Bg6 6.h4 etc.
4.f3 Bf5 5.g4 Bg6 6.g5
4.f3 Bf5 5.fxe4 Bxe4
4.f3 Bf5 5.fxe4 Nxe4 etc.
4.f3 Bf5 5.fxe4 Nxe4 6.Qf3 Nxc3 7.bxc3 Qc8
4.f3 e6 5.fxe4
4.f3 e3 5.Bxe3 g6 etc.
4.f3 e3 5.Bxe3 e6
4.f3 e3 5.Bxe3 Bf5
4.f3 c6 5.Bc4
4.f3 c6 5.fxe4
4.f3 c6 5.Nxe4
4.f3 Bf5 5.g4 Bg6 6.h4 etc.
4.f3 Bf5 5.g4 Bg6 6.g5
4.f3 Bf5 5.fxe4 Bxe4
4.f3 Bf5 5.fxe4 Nxe4 etc.
4.f3 Bf5 5.fxe4 Nxe4 6.Qf3 Nxc3 7.bxc3 Qc8
BDG Accepted: 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3
5.Qxf3 Bg4 etc.
5.Qxf3 c6
5.Qxf3 e6
5.Qxf3 Nc6
5.Qxf3 Qxd4 6.Be3 etc.
5.Qxf3 Qxd4 6.Be3 Qg4
5.Nxf3 Nc6 etc.
5.Nxf3 c6 6.Bd3 etc.
5.Nxf3 c6 6.Bc4 e6 etc.
5.Qxf3 c6
5.Qxf3 e6
5.Qxf3 Nc6
5.Qxf3 Qxd4 6.Be3 etc.
5.Qxf3 Qxd4 6.Be3 Qg4
5.Nxf3 Nc6 etc.
5.Nxf3 c6 6.Bd3 etc.
5.Nxf3 c6 6.Bc4 e6 etc.
5.Nxf3 c6 6.Bc4 Bf5
5.Nxf3 e6 6.Bd3 etc.
5.Nxf3 e6 6.Bg5 Be7 etc.
5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nbd7 etc.
5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nc6
5.Nxf3 g6 6.Bg5 etc.
5.Nxf3 g6 6.Bf4
5.Nxf3 g6 6.Bc4 Bg7 7.Qd2 etc.5.Nxf3 e6 6.Bd3 etc.
5.Nxf3 e6 6.Bg5 Be7 etc.
5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nbd7 etc.
5.Nxf3 e6 6.Bg5 Be7 7.Bd3 Nc6
5.Nxf3 g6 6.Bg5 etc.
5.Nxf3 g6 6.Bf4
5.Nxf3 g6 6.Bc4 Bg7 7.0-0 0-0 8.Qe1
5.Nxf3 Bf5 6.Bc4
5.Nxf3 Bf5 6.Ne5 e6 7.g4 Be4 etc.
5.Nxf3 Bf5 6.Ne5 e6 7.g4 Ne4
5.Nxf3 Bf5 6.Ne5 e6 7.g4 Bg6
5.Nxf3 Bg4 6.Bc4 etc.
5.Nxf3 Bg4 6.h3 Bh5 etc.
5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.g4 etc.
5.Nxf3 Bg4 6.h3 Bxf3 7.Qxf3 c6 8.Be3