Sources
These books contain a plethora of information for use in your Battletech games and also are known to contain a few unique units that fit well within the source information.
Alpha Strike Lance Packs ASLancePack
BattleTech Dossiers: Jason Zaklan BD:JZ
BattleTech Dossiers: Lamenkov's Liability BD:LL
BattleTech Dossiers: Salazar Tsakalotos BD:ST
BattleTech Dossiers: The Bounty Hunter BD:BH
BattleTech Dossiers: Youling Zhanshi BD:YZ
Combat Manual: Kurita CM:Kurita
Combat Manual: Mercenaries CM:Mercs
Dark Age Turning Points: Liao DTP:Liao
Dark Age Turning Points: Vega DTP:Vega
Decision At Thunder Rift Decision At Thunder Rift
Double Blind Double Blind
DropShips and JumpShips D&J
Era Digest: Age of War ED:AoW
Era Digest: Dark Age ED: DA
Era Digest: Golden Century ED: GC
Era Report: 2750 ER: 2750
Experimental Technical Readout: Boondocks XTR: Boondocks
Experimental Technical Readout: Boondoggles XTR: Boondoggles
Experimental Technical Readout: Caveat Emptor XTR: Caveat
Experimental Technical Readout: Comstar XTR: Comstar
Experimental Technical Readout: Corporations XTR: Corps
Experimental Technical Readout: Davion XTR: Davion
Experimental Technical Readout: Gladiators XTR: Gladiators
Experimental Technical Readout: Gunslingers XTR: Gunslingers
Experimental Technical Readout: Kurita XTR: Kurita
Experimental Technical Readout: Liao XTR: Liao
Experimental Technical Readout: Marik XTR: Marik
Experimental Technical Readout: Mercs XTR: Mercs
Experimental Technical Readout: Most Wanted XTR: Most Wanted
Experimental Technical Readout: Periphery XTR: Periphery
Experimental Technical Readout: Phantoms XTR: Phantoms
Experimental Technical Readout: Pirates XTR: Pirates
Experimental Technical Readout: Primitives Vol 1 XTR: Primitives I
Experimental Technical Readout: Primitives Vol 2 XTR: Primitives II
Experimental Technical Readout: Primitives Vol 3 XTR: Primitives III
Experimental Technical Readout: Primitives Vol 4 XTR: Primitives IV
Experimental Technical Readout: Primitives Vol 5 XTR: Primitives V
Experimental Technical Readout: Republic Volume I XTR: RotS 1
Experimental Technical Readout: Republic Volume II XTR: RotS 2
Experimental Technical Readout: Republic Volume III XTR: RotS 3
Experimental Technical Readout: RetroTech XTR: RetroTech
Experimental Technical Readout: Royal Fantasy XTR:Royal Fantasy
Experimental Technical Readout: Steiner XTR: Steiner
Experimental Technical Readout: Succession Wars I XTR: SW
Experimental Technical Readout: The Clans XTR: Clans
Field Manual: Draconis Combine FMDC
Field Manual: Federated Suns FMFS
Field Report 2765 AFFS FR: 2765-AFFS
Field Report 2765 CCAF FR: 2765-CCAF
Field Report 2765 DCMS FR: 2765-DCMS
Field Report 2765 FWLM FR: 2765-FWLM
Field Report 2765 LCAF FR: 2765-LCAF
Field Report 2765: Periphery FR: 2765-Periphery
Handbook: House Davion HBHD
Handbook: House Kurita HBHK
Handbook: House Liao HBHL
Handbook: House Marik HBHM
Handbook: House Steiner HBHS
Handbook: Major Periphery States HBMPS
Historical Turning Points: Antallos HTP: Antallos
Historical Turning Points: Galtor HTP: Galtor
Historical Turning Points: Glengarry HTP: Glengarry
Historical Turning Points: Luzerne HTP: Luzerne
Historical Turning Points: Misery HTP: Misery
Historical Turning Points: New Dallas HTP: New Dallas
Historical Turning Points: Tortuga HTP: Tortuga
Historical: Liberation of Terra I His: LoT1
Historical: Liberation of Terra II His: LoT2
Historical: Operation Klondike His: OK
Historical: Reunification War HIS: RW
Historical: Wars of the Republic Era His: WotRE
House Arano: The Aurigan Coalition HA
Interstellar Expeditions: Interstellar Players 3 IE:IP3
Jihad Conspiracies: Interstellar Players 2 ISP2
Jihad Hot Spots: 3076 JHS3076
Jihad Hot Spots: Terra JHSTerra
Jihad Secrets: The Blake Documents JSBD
Jihad Turning Points: Atreus JTPAtreus
Jihad Turning Points: Atreus BC exclusive JTP:AtreusBC
Jihad Turning Points: Dieron JTPDieron
Jihad Turning Points: Hesperus II JTPHerperus II
Jihad Turning Points: Luthien JTPLuthien
Jihad Turning Points: New Avalon JTPNewAvalon
Jihad Turning Points: Sian JTPSian
Jihad Turning Points: Tharkad JTPTharkad
Jihad: Final Reckoning JFR
Mercenaries Supplemental II MSII
Operational Turning Points: Death to Mercenaries OTP:DTM
Operational Turning Points: Falcon Incursion OTP:FI
Operational Turning Points: Fronc Reaches OTP:FR
Operational Turning Points: Hanseatic Crusade OTP:HC
Operational Turning Points: The Red Corsair OTP:RC
Operational Turning Points: Widowmaker Absorption OTP:WA
Recognition Guide: ilClan Vol. 01 RG01
Recognition Guide: ilClan Vol. 02 RG02
Recognition Guide: ilClan Vol. 03 RG03
Recognition Guide: ilClan Vol. 04 RG04
Recognition Guide: ilClan Vol. 05 RG05
Recognition Guide: ilClan Vol. 06 RG06
Recognition Guide: ilClan Vol. 07 RG07
Recognition Guide: ilClan Vol. 08 RG08
Recognition Guide: ilClan Vol. 09 RG09
Recognition Guide: ilClan Vol. 10 RG10
Recognition Guide: ilClan Vol. 11 RG11
Recognition Guide: ilClan Vol. 12 RG12
Recognition Guide: ilClan Vol. 13 RG13
Recognition Guide: ilClan Vol. 14 RG14
Recognition Guide: ilClan Vol. 15 RG15
Recognition Guide: ilClan Vol. 16 RG16
Recognition Guide: ilClan Vol. 17 RG17
Recognition Guide: ilClan Vol. 18 RG18
Recognition Guide: ilClan Vol. 19 RG19
Recognition Guide: ilClan Vol. 20 RG20
Recognition Guide: ilClan Vol. 21 RG21
Recognition Guide: ilClan Vol. 22 RG22
Recognition Guide: ilClan Vol. 23 RG23
Recognition Guide: ilClan Vol. 24 RG24
Record Sheets: 3039 Unabridged RS3039u
Record Sheets: 3050 Upgrade Unabridged, Clan and Star League RS3050Uu-C
Record Sheets: 3050 Upgrade Unabridged, Inner Sphere RS3050Uu-I
Record Sheets: 3055 Upgrade Unabridged RS3055Uu
Record Sheets: 3058 Upgrade Unabridged, Clan RS3058Uu-C
Record Sheets: 3058 Upgrade Unabridged, Inner Sphere RS3058Uu-I
Record Sheets: 3060 Unabridged RS3060u
Record Sheets: 3067 Unabridged RS3067u
Record Sheets: 3075 Unabridged - Age of War RS3075u-AW
Record Sheets: 3075 Unabridged - The Cutting Edge RS3075u-CE
Record Sheets: 3085 Unabridged — Cutting Edge RS3085u-CE
Record Sheets: 3085 Unabridged — Old is the New New RS3085u-ONN
Record Sheets: 3085 Unabridged — Project Phoenix RS3085u-PP
Record Sheets: 3145 New Tech New Upgrades RS3145-NTNU
Record Sheets: 3145 Unabridged RS3145u
Record Sheets: Clan Invasion RSCI
Record Sheets: ForcePack Wolf's Dragoons RSFPWD
Record Sheets: MechWarrior Dark Age I RSMWDA
Record Sheets: Operation Klondike RSOK
Record Sheets: Prototypes RSProto
Record Sheets: Succession Wars RSSW
Record Sheets: Unique Fighters RSUF
Record Sheets: Unique 'Mechs RSUM
Record Sheets: Vehicle Annex, IndustrialMechs & Exoskeletons RSVA
Redemption and Malice R&M
Second Succession War 2SW
Spotlight On: Holt's Hilltoppers SO:HH
Spotlight On: Thermo Police SO:TP
Spotlight On: Unending Faith SO:UF
Starterbook: Sword and Dragon SBS&D
Starterbook: Wolf & Blake SBW&B
Tactical Operations: Advanced Units and Equipment TOAUE
Tactics of Duty Tactics of Duty
Technical Readout: 3039 TR3039
Technical Readout: 3050 Upgrade TR3050U
Technical Readout: 3055 Upgrade TR3055U
Technical Readout: 3057 (Revised Edition) TR3057r
Technical Readout: 3058 Upgrade TR3058U
Technical Readout: 3060 TR3060
Technical Readout: 3067 TR3067
Technical Readout: 3075 TR3075
Technical Readout: 3085 TR3085
Technical Readout: 3085 Supplemental TR3085S
Technical Readout: 3145 TR3145
Technical Readout: 3150 TR3150
Technical Readout: Clan Invasion TRCI
Technical Readout: Golden Century TRGC
Technical Readout: Irregulars TRI
Technical Readout: Jihad TRJ
Technical Readout: Project Phoenix TRPP
Technical Readout: Prototypes TRProto
Technical Readout: Succession Wars TRSW
Technical Readout: Vehicle Annex, Revised TRVAr
The Falcon and the Wolf FW
Touring the Stars: Granada TtS: Granada
Touring the Stars: Gulf Breeze TtS:Gulf
Touring the Stars: Kaumberg TtS:Kaumberg
Touring the Stars: Tortuga Prime TtS:Tortuga
Touring the Stars: Valencia TtS:Valencia
Turing Points: War of 3039 - Vega TP:39V
Turning Points: Arcturus TP:Arcturus
Turning Points: Capellan Crusades TP:CC
Turning Points: Epsilon Eridani TP:EE
Turning Points: Helm TP: Helm
Turning Points: Irian TP: Irian
Wars of Reaving Supplemental WoRS
Wolf Hunters Wolf Hunters