Fundamental chess openings or Chess Openings: theory and practice

Christ's sake where's the prices gone
Try with space between the price and the £. . £ 10 or 10 £.
chess.com parser is wonky, similar issue posting chess moves.
Haha, in my first sentence I tried to post "e . g . " without the spaces and the parser removed the e and the g .
To the original question, Chess Openings Theory and Practice is in descriptive notation. For old-timers it's no problem, but today the majority of chess players can't read it. I learned from this book, it was excellent for its time and I still have a copy.
Fundamental Chess Openings is newer and in the now universal algebraic notation. The better choice for most today. Maybe good for getting your feet wet in an opening but not enough detail for my needs.

Opening study doesn't really become an important factor until your playing strength reaches 2000 or so. Instead, study basic tactics... Pin, Fork, Skewer, Overload, Guard Destruction, Interference, Line Opening, Sealing and Sweeping, etc. Another important area to study is simple endgames such as King and Pawn vs King, King and Pawns vs King and Pawns, King and Rook and Pawn against King and Rook, and so on. Model checkmate patterns are also important... Smothered mate, Corridor mate, Lolli mate, Greco mate, Boden's mate, and a dozen more.
All of that is more useful at your level than memorizing opening lines, especially if you don't yet understand WHY those particular moves are being made.