Nihon Ki-in red cover series
This red cover series is usable without being able to read Japanese, though there is Japanese text that you are going to miss out on. Familiarity with intermediate japanese for reading go books is enough.
Nihon Ki-in page for these books.
An initially easy life & death collection of 150 problems. Gets harder in the second half. Always difficult to estimate, but I feel the level goes from 12k to 2k.
150 tactical problems on nearly completed 9x9 boards. Spot the capturing tesuji type of thing. A result of this format is you know whose turn it is to play, but you don't know if you are looking for just one tesuji sequence, or more than one in separate parts of the board. So added realism making it nearer to a game. Perhaps 15-8k level.
120 problems. Perhaps 15 - 4k level.
Section 1 - 40 problems. Nets and break throughs. Tesuji where the explanation needs 2 or 3 pages to explain. Real board situations and often joseki related.
Section 2 - 20 problems. Connections near the edge.
Section 3 - 20 problems. Common positions where kyu players go wrong. Mainly joseki related.
Section 4 - 20 problems. Common invasions.
Section 5 - 20 problems. Endgame tesuji, e.g. monkey jumps.
150 problems
150 problems